diff --git a/CODEOWNERS b/CODEOWNERS
index 04711d45db72..0b8eafa86b31 100644
--- a/CODEOWNERS
+++ b/CODEOWNERS
@@ -185,6 +185,7 @@ homeassistant/components/http/* @home-assistant/core
 homeassistant/components/huawei_lte/* @scop @fphammerle
 homeassistant/components/huawei_router/* @abmantis
 homeassistant/components/hue/* @balloob
+homeassistant/components/humidifier/* @home-assistant/core @Shulyaka
 homeassistant/components/hunterdouglas_powerview/* @bdraco
 homeassistant/components/hvv_departures/* @vigonotion
 homeassistant/components/hydrawise/* @ptcryan
diff --git a/homeassistant/components/demo/__init__.py b/homeassistant/components/demo/__init__.py
index 344ffbd9fd30..8121d4933154 100644
--- a/homeassistant/components/demo/__init__.py
+++ b/homeassistant/components/demo/__init__.py
@@ -18,6 +18,7 @@ COMPONENTS_WITH_CONFIG_ENTRY_DEMO_PLATFORM = [
     "climate",
     "cover",
     "fan",
+    "humidifier",
     "light",
     "lock",
     "media_player",
diff --git a/homeassistant/components/demo/humidifier.py b/homeassistant/components/demo/humidifier.py
new file mode 100644
index 000000000000..35eb6e185375
--- /dev/null
+++ b/homeassistant/components/demo/humidifier.py
@@ -0,0 +1,124 @@
+"""Demo platform that offers a fake humidifier device."""
+from homeassistant.components.humidifier import HumidifierEntity
+from homeassistant.components.humidifier.const import (
+    DEVICE_CLASS_DEHUMIDIFIER,
+    DEVICE_CLASS_HUMIDIFIER,
+    SUPPORT_MODES,
+)
+
+SUPPORT_FLAGS = 0
+
+
+async def async_setup_platform(hass, config, async_add_entities, discovery_info=None):
+    """Set up the Demo humidifier devices."""
+    async_add_entities(
+        [
+            DemoHumidifier(
+                name="Humidifier",
+                mode=None,
+                target_humidity=68,
+                device_class=DEVICE_CLASS_HUMIDIFIER,
+            ),
+            DemoHumidifier(
+                name="Dehumidifier",
+                mode=None,
+                target_humidity=54,
+                device_class=DEVICE_CLASS_DEHUMIDIFIER,
+            ),
+            DemoHumidifier(
+                name="Hygrostat",
+                mode="home",
+                available_modes=["home", "eco"],
+                target_humidity=50,
+            ),
+        ]
+    )
+
+
+async def async_setup_entry(hass, config_entry, async_add_entities):
+    """Set up the Demo humidifier devices config entry."""
+    await async_setup_platform(hass, {}, async_add_entities)
+
+
+class DemoHumidifier(HumidifierEntity):
+    """Representation of a demo humidifier device."""
+
+    def __init__(
+        self,
+        name,
+        mode,
+        target_humidity,
+        available_modes=None,
+        is_on=True,
+        device_class=None,
+    ):
+        """Initialize the humidifier device."""
+        self._name = name
+        self._state = is_on
+        self._support_flags = SUPPORT_FLAGS
+        if mode is not None:
+            self._support_flags = self._support_flags | SUPPORT_MODES
+        self._target_humidity = target_humidity
+        self._mode = mode
+        self._available_modes = available_modes
+        self._device_class = device_class
+
+    @property
+    def supported_features(self):
+        """Return the list of supported features."""
+        return self._support_flags
+
+    @property
+    def should_poll(self):
+        """Return the polling state."""
+        return False
+
+    @property
+    def name(self):
+        """Return the name of the humidity device."""
+        return self._name
+
+    @property
+    def target_humidity(self):
+        """Return the humidity we try to reach."""
+        return self._target_humidity
+
+    @property
+    def mode(self):
+        """Return current mode."""
+        return self._mode
+
+    @property
+    def available_modes(self):
+        """Return available modes."""
+        return self._available_modes
+
+    @property
+    def is_on(self):
+        """Return true if the humidifier is on."""
+        return self._state
+
+    @property
+    def device_class(self):
+        """Return the device class of the humidifier."""
+        return self._device_class
+
+    async def async_turn_on(self, **kwargs):
+        """Turn the device on."""
+        self._state = True
+        self.async_write_ha_state()
+
+    async def async_turn_off(self, **kwargs):
+        """Turn the device off."""
+        self._state = False
+        self.async_write_ha_state()
+
+    async def async_set_humidity(self, humidity):
+        """Set new humidity level."""
+        self._target_humidity = humidity
+        self.async_write_ha_state()
+
+    async def async_set_mode(self, mode):
+        """Update mode."""
+        self._mode = mode
+        self.async_write_ha_state()
diff --git a/homeassistant/components/history/__init__.py b/homeassistant/components/history/__init__.py
index 52788317378d..72f0fac481b1 100644
--- a/homeassistant/components/history/__init__.py
+++ b/homeassistant/components/history/__init__.py
@@ -50,9 +50,21 @@ CONFIG_SCHEMA = vol.Schema(
     extra=vol.ALLOW_EXTRA,
 )
 
-SIGNIFICANT_DOMAINS = ("climate", "device_tracker", "thermostat", "water_heater")
+SIGNIFICANT_DOMAINS = (
+    "climate",
+    "device_tracker",
+    "humidifier",
+    "thermostat",
+    "water_heater",
+)
 IGNORE_DOMAINS = ("zone", "scene")
-NEED_ATTRIBUTE_DOMAINS = {"climate", "water_heater", "thermostat", "script"}
+NEED_ATTRIBUTE_DOMAINS = {
+    "climate",
+    "humidifier",
+    "script",
+    "thermostat",
+    "water_heater",
+}
 SCRIPT_DOMAIN = "script"
 ATTR_CAN_CANCEL = "can_cancel"
 
diff --git a/homeassistant/components/humidifier/__init__.py b/homeassistant/components/humidifier/__init__.py
new file mode 100644
index 000000000000..fc455feb477a
--- /dev/null
+++ b/homeassistant/components/humidifier/__init__.py
@@ -0,0 +1,175 @@
+"""Provides functionality to interact with humidifier devices."""
+from datetime import timedelta
+import logging
+from typing import Any, Dict, List, Optional
+
+import voluptuous as vol
+
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.const import (
+    SERVICE_TOGGLE,
+    SERVICE_TURN_OFF,
+    SERVICE_TURN_ON,
+    STATE_ON,
+)
+import homeassistant.helpers.config_validation as cv
+from homeassistant.helpers.config_validation import (  # noqa: F401
+    PLATFORM_SCHEMA,
+    PLATFORM_SCHEMA_BASE,
+)
+from homeassistant.helpers.entity import ToggleEntity
+from homeassistant.helpers.entity_component import EntityComponent
+from homeassistant.helpers.typing import ConfigType, HomeAssistantType
+from homeassistant.loader import bind_hass
+
+from .const import (
+    ATTR_AVAILABLE_MODES,
+    ATTR_HUMIDITY,
+    ATTR_MAX_HUMIDITY,
+    ATTR_MIN_HUMIDITY,
+    ATTR_MODE,
+    DEFAULT_MAX_HUMIDITY,
+    DEFAULT_MIN_HUMIDITY,
+    DEVICE_CLASS_DEHUMIDIFIER,
+    DEVICE_CLASS_HUMIDIFIER,
+    DOMAIN,
+    SERVICE_SET_HUMIDITY,
+    SERVICE_SET_MODE,
+    SUPPORT_MODES,
+)
+
+_LOGGER = logging.getLogger(__name__)
+
+
+SCAN_INTERVAL = timedelta(seconds=60)
+
+DEVICE_CLASSES = [DEVICE_CLASS_HUMIDIFIER, DEVICE_CLASS_DEHUMIDIFIER]
+
+DEVICE_CLASSES_SCHEMA = vol.All(vol.Lower, vol.In(DEVICE_CLASSES))
+
+
+@bind_hass
+def is_on(hass, entity_id):
+    """Return if the humidifier is on based on the statemachine.
+
+    Async friendly.
+    """
+    return hass.states.is_state(entity_id, STATE_ON)
+
+
+async def async_setup(hass: HomeAssistantType, config: ConfigType) -> bool:
+    """Set up humidifier devices."""
+    component = hass.data[DOMAIN] = EntityComponent(
+        _LOGGER, DOMAIN, hass, SCAN_INTERVAL
+    )
+    await component.async_setup(config)
+
+    component.async_register_entity_service(SERVICE_TURN_ON, {}, "async_turn_on")
+    component.async_register_entity_service(SERVICE_TURN_OFF, {}, "async_turn_off")
+    component.async_register_entity_service(SERVICE_TOGGLE, {}, "async_toggle")
+    component.async_register_entity_service(
+        SERVICE_SET_MODE,
+        {vol.Required(ATTR_MODE): cv.string},
+        "async_set_mode",
+        [SUPPORT_MODES],
+    )
+    component.async_register_entity_service(
+        SERVICE_SET_HUMIDITY,
+        {
+            vol.Required(ATTR_HUMIDITY): vol.All(
+                vol.Coerce(int), vol.Range(min=0, max=100)
+            )
+        },
+        "async_set_humidity",
+    )
+
+    return True
+
+
+async def async_setup_entry(hass: HomeAssistantType, entry: ConfigEntry) -> bool:
+    """Set up a config entry."""
+    return await hass.data[DOMAIN].async_setup_entry(entry)
+
+
+async def async_unload_entry(hass: HomeAssistantType, entry: ConfigEntry) -> bool:
+    """Unload a config entry."""
+    return await hass.data[DOMAIN].async_unload_entry(entry)
+
+
+class HumidifierEntity(ToggleEntity):
+    """Representation of a humidifier device."""
+
+    @property
+    def capability_attributes(self) -> Dict[str, Any]:
+        """Return capability attributes."""
+        supported_features = self.supported_features or 0
+        data = {
+            ATTR_MIN_HUMIDITY: self.min_humidity,
+            ATTR_MAX_HUMIDITY: self.max_humidity,
+        }
+
+        if supported_features & SUPPORT_MODES:
+            data[ATTR_AVAILABLE_MODES] = self.available_modes
+
+        return data
+
+    @property
+    def state_attributes(self) -> Dict[str, Any]:
+        """Return the optional state attributes."""
+        supported_features = self.supported_features or 0
+        data = {}
+
+        if self.target_humidity is not None:
+            data[ATTR_HUMIDITY] = self.target_humidity
+
+        if supported_features & SUPPORT_MODES:
+            data[ATTR_MODE] = self.mode
+
+        return data
+
+    @property
+    def target_humidity(self) -> Optional[int]:
+        """Return the humidity we try to reach."""
+        return None
+
+    @property
+    def mode(self) -> Optional[str]:
+        """Return the current mode, e.g., home, auto, baby.
+
+        Requires SUPPORT_MODES.
+        """
+        raise NotImplementedError
+
+    @property
+    def available_modes(self) -> Optional[List[str]]:
+        """Return a list of available modes.
+
+        Requires SUPPORT_MODES.
+        """
+        raise NotImplementedError
+
+    def set_humidity(self, humidity: int) -> None:
+        """Set new target humidity."""
+        raise NotImplementedError()
+
+    async def async_set_humidity(self, humidity: int) -> None:
+        """Set new target humidity."""
+        await self.hass.async_add_executor_job(self.set_humidity, humidity)
+
+    def set_mode(self, mode: str) -> None:
+        """Set new mode."""
+        raise NotImplementedError()
+
+    async def async_set_mode(self, mode: str) -> None:
+        """Set new mode."""
+        await self.hass.async_add_executor_job(self.set_mode, mode)
+
+    @property
+    def min_humidity(self) -> int:
+        """Return the minimum humidity."""
+        return DEFAULT_MIN_HUMIDITY
+
+    @property
+    def max_humidity(self) -> int:
+        """Return the maximum humidity."""
+        return DEFAULT_MAX_HUMIDITY
diff --git a/homeassistant/components/humidifier/const.py b/homeassistant/components/humidifier/const.py
new file mode 100644
index 000000000000..82e87ae5c31d
--- /dev/null
+++ b/homeassistant/components/humidifier/const.py
@@ -0,0 +1,30 @@
+"""Provides the constants needed for component."""
+
+MODE_NORMAL = "normal"
+MODE_ECO = "eco"
+MODE_AWAY = "away"
+MODE_BOOST = "boost"
+MODE_COMFORT = "comfort"
+MODE_HOME = "home"
+MODE_SLEEP = "sleep"
+MODE_AUTO = "auto"
+MODE_BABY = "baby"
+
+ATTR_MODE = "mode"
+ATTR_AVAILABLE_MODES = "available_modes"
+ATTR_HUMIDITY = "humidity"
+ATTR_MAX_HUMIDITY = "max_humidity"
+ATTR_MIN_HUMIDITY = "min_humidity"
+
+DEFAULT_MIN_HUMIDITY = 0
+DEFAULT_MAX_HUMIDITY = 100
+
+DOMAIN = "humidifier"
+
+DEVICE_CLASS_HUMIDIFIER = "humidifier"
+DEVICE_CLASS_DEHUMIDIFIER = "dehumidifier"
+
+SERVICE_SET_MODE = "set_mode"
+SERVICE_SET_HUMIDITY = "set_humidity"
+
+SUPPORT_MODES = 1
diff --git a/homeassistant/components/humidifier/manifest.json b/homeassistant/components/humidifier/manifest.json
new file mode 100644
index 000000000000..b64065a2583a
--- /dev/null
+++ b/homeassistant/components/humidifier/manifest.json
@@ -0,0 +1,7 @@
+{
+  "domain": "humidifier",
+  "name": "Humidifier",
+  "documentation": "https://www.home-assistant.io/integrations/humidifier",
+  "codeowners": ["@home-assistant/core", "@Shulyaka"],
+  "quality_scale": "internal"
+}
diff --git a/homeassistant/components/humidifier/services.yaml b/homeassistant/components/humidifier/services.yaml
new file mode 100644
index 000000000000..d10f2fb604b0
--- /dev/null
+++ b/homeassistant/components/humidifier/services.yaml
@@ -0,0 +1,42 @@
+# Describes the format for available humidifier services
+
+set_mode:
+  description: Set mode for humidifier device.
+  fields:
+    entity_id:
+      description: Name(s) of entities to change.
+      example: 'humidifier.bedroom'
+    mode:
+      description: New mode
+      example: 'away'
+
+set_humidity:
+  description: Set target humidity of humidifier device.
+  fields:
+    entity_id:
+      description: Name(s) of entities to change.
+      example: 'humidifier.bedroom'
+    humidity:
+      description: New target humidity for humidifier device.
+      example: 50
+
+turn_on:
+  description: Turn humidifier device on.
+  fields:
+    entity_id:
+      description: Name(s) of entities to change.
+      example: 'humidifier.bedroom'
+
+turn_off:
+  description: Turn humidifier device off.
+  fields:
+    entity_id:
+      description: Name(s) of entities to change.
+      example: 'humidifier.bedroom'
+
+toggle:
+  description: Toggles a humidifier device.
+  fields:
+    entity_id:
+      description: Name(s) of entities to toggle.
+      example: 'humidifier.bedroom'
diff --git a/tests/components/demo/test_humidifier.py b/tests/components/demo/test_humidifier.py
new file mode 100644
index 000000000000..ba2bd60f8f22
--- /dev/null
+++ b/tests/components/demo/test_humidifier.py
@@ -0,0 +1,166 @@
+"""The tests for the demo humidifier component."""
+
+import pytest
+import voluptuous as vol
+
+from homeassistant.components.humidifier.const import (
+    ATTR_HUMIDITY,
+    ATTR_MAX_HUMIDITY,
+    ATTR_MIN_HUMIDITY,
+    ATTR_MODE,
+    DOMAIN,
+    MODE_AWAY,
+    MODE_ECO,
+    SERVICE_SET_HUMIDITY,
+    SERVICE_SET_MODE,
+)
+from homeassistant.const import (
+    ATTR_ENTITY_ID,
+    SERVICE_TOGGLE,
+    SERVICE_TURN_OFF,
+    SERVICE_TURN_ON,
+    STATE_OFF,
+    STATE_ON,
+)
+from homeassistant.setup import async_setup_component
+
+ENTITY_DEHUMIDIFIER = "humidifier.dehumidifier"
+ENTITY_HYGROSTAT = "humidifier.hygrostat"
+ENTITY_HUMIDIFIER = "humidifier.humidifier"
+
+
+@pytest.fixture(autouse=True)
+async def setup_demo_humidifier(hass):
+    """Initialize setup demo humidifier."""
+    assert await async_setup_component(
+        hass, DOMAIN, {"humidifier": {"platform": "demo"}}
+    )
+    await hass.async_block_till_done()
+
+
+def test_setup_params(hass):
+    """Test the initial parameters."""
+    state = hass.states.get(ENTITY_DEHUMIDIFIER)
+    assert state.state == STATE_ON
+    assert state.attributes.get(ATTR_HUMIDITY) == 54
+
+
+def test_default_setup_params(hass):
+    """Test the setup with default parameters."""
+    state = hass.states.get(ENTITY_DEHUMIDIFIER)
+    assert state.attributes.get(ATTR_MIN_HUMIDITY) == 0
+    assert state.attributes.get(ATTR_MAX_HUMIDITY) == 100
+
+
+async def test_set_target_humidity_bad_attr(hass):
+    """Test setting the target humidity without required attribute."""
+    state = hass.states.get(ENTITY_DEHUMIDIFIER)
+    assert state.attributes.get(ATTR_HUMIDITY) == 54
+
+    with pytest.raises(vol.Invalid):
+        await hass.services.async_call(
+            DOMAIN,
+            SERVICE_SET_HUMIDITY,
+            {ATTR_HUMIDITY: None, ATTR_ENTITY_ID: ENTITY_DEHUMIDIFIER},
+            blocking=True,
+        )
+    await hass.async_block_till_done()
+
+    state = hass.states.get(ENTITY_DEHUMIDIFIER)
+    assert state.attributes.get(ATTR_HUMIDITY) == 54
+
+
+async def test_set_target_humidity(hass):
+    """Test the setting of the target humidity."""
+    state = hass.states.get(ENTITY_DEHUMIDIFIER)
+    assert state.attributes.get(ATTR_HUMIDITY) == 54
+
+    await hass.services.async_call(
+        DOMAIN,
+        SERVICE_SET_HUMIDITY,
+        {ATTR_HUMIDITY: 64, ATTR_ENTITY_ID: ENTITY_DEHUMIDIFIER},
+        blocking=True,
+    )
+    await hass.async_block_till_done()
+
+    state = hass.states.get(ENTITY_DEHUMIDIFIER)
+    assert state.attributes.get(ATTR_HUMIDITY) == 64
+
+
+async def test_set_hold_mode_away(hass):
+    """Test setting the hold mode away."""
+    await hass.services.async_call(
+        DOMAIN,
+        SERVICE_SET_MODE,
+        {ATTR_MODE: MODE_AWAY, ATTR_ENTITY_ID: ENTITY_HYGROSTAT},
+        blocking=True,
+    )
+    await hass.async_block_till_done()
+
+    state = hass.states.get(ENTITY_HYGROSTAT)
+    assert state.attributes.get(ATTR_MODE) == MODE_AWAY
+
+
+async def test_set_hold_mode_eco(hass):
+    """Test setting the hold mode eco."""
+    await hass.services.async_call(
+        DOMAIN,
+        SERVICE_SET_MODE,
+        {ATTR_MODE: MODE_ECO, ATTR_ENTITY_ID: ENTITY_HYGROSTAT},
+        blocking=True,
+    )
+    await hass.async_block_till_done()
+
+    state = hass.states.get(ENTITY_HYGROSTAT)
+    assert state.attributes.get(ATTR_MODE) == MODE_ECO
+
+
+async def test_turn_on(hass):
+    """Test turn on device."""
+    await hass.services.async_call(
+        DOMAIN, SERVICE_TURN_OFF, {ATTR_ENTITY_ID: ENTITY_DEHUMIDIFIER}, blocking=True
+    )
+    state = hass.states.get(ENTITY_DEHUMIDIFIER)
+    assert state.state == STATE_OFF
+
+    await hass.services.async_call(
+        DOMAIN, SERVICE_TURN_ON, {ATTR_ENTITY_ID: ENTITY_DEHUMIDIFIER}, blocking=True
+    )
+    state = hass.states.get(ENTITY_DEHUMIDIFIER)
+    assert state.state == STATE_ON
+
+
+async def test_turn_off(hass):
+    """Test turn off device."""
+    await hass.services.async_call(
+        DOMAIN, SERVICE_TURN_ON, {ATTR_ENTITY_ID: ENTITY_DEHUMIDIFIER}, blocking=True
+    )
+    state = hass.states.get(ENTITY_DEHUMIDIFIER)
+    assert state.state == STATE_ON
+
+    await hass.services.async_call(
+        DOMAIN, SERVICE_TURN_OFF, {ATTR_ENTITY_ID: ENTITY_DEHUMIDIFIER}, blocking=True
+    )
+    state = hass.states.get(ENTITY_DEHUMIDIFIER)
+    assert state.state == STATE_OFF
+
+
+async def test_toggle(hass):
+    """Test toggle device."""
+    await hass.services.async_call(
+        DOMAIN, SERVICE_TURN_ON, {ATTR_ENTITY_ID: ENTITY_DEHUMIDIFIER}, blocking=True
+    )
+    state = hass.states.get(ENTITY_DEHUMIDIFIER)
+    assert state.state == STATE_ON
+
+    await hass.services.async_call(
+        DOMAIN, SERVICE_TOGGLE, {ATTR_ENTITY_ID: ENTITY_DEHUMIDIFIER}, blocking=True
+    )
+    state = hass.states.get(ENTITY_DEHUMIDIFIER)
+    assert state.state == STATE_OFF
+
+    await hass.services.async_call(
+        DOMAIN, SERVICE_TOGGLE, {ATTR_ENTITY_ID: ENTITY_DEHUMIDIFIER}, blocking=True
+    )
+    state = hass.states.get(ENTITY_DEHUMIDIFIER)
+    assert state.state == STATE_ON
diff --git a/tests/components/humidifier/__init__.py b/tests/components/humidifier/__init__.py
new file mode 100644
index 000000000000..1ef3f5b72164
--- /dev/null
+++ b/tests/components/humidifier/__init__.py
@@ -0,0 +1 @@
+"""The tests for humidifier component."""
diff --git a/tests/components/humidifier/test_init.py b/tests/components/humidifier/test_init.py
new file mode 100644
index 000000000000..22af30d484a9
--- /dev/null
+++ b/tests/components/humidifier/test_init.py
@@ -0,0 +1,35 @@
+"""The tests for the humidifier component."""
+from unittest.mock import MagicMock
+
+from homeassistant.components.humidifier import HumidifierEntity
+
+
+class MockHumidifierEntity(HumidifierEntity):
+    """Mock Humidifier device to use in tests."""
+
+    @property
+    def supported_features(self) -> int:
+        """Return the list of supported features."""
+        return 0
+
+
+async def test_sync_turn_on(hass):
+    """Test if async turn_on calls sync turn_on."""
+    humidifier = MockHumidifierEntity()
+    humidifier.hass = hass
+
+    humidifier.turn_on = MagicMock()
+    await humidifier.async_turn_on()
+
+    assert humidifier.turn_on.called
+
+
+async def test_sync_turn_off(hass):
+    """Test if async turn_off calls sync turn_off."""
+    humidifier = MockHumidifierEntity()
+    humidifier.hass = hass
+
+    humidifier.turn_off = MagicMock()
+    await humidifier.async_turn_off()
+
+    assert humidifier.turn_off.called