diff --git a/CODEOWNERS b/CODEOWNERS
index f45c9c1db4..1edea18157 100644
--- a/CODEOWNERS
+++ b/CODEOWNERS
@@ -86,6 +86,7 @@ esphome/components/number/* @esphome/core
 esphome/components/ota/* @esphome/core
 esphome/components/output/* @esphome/core
 esphome/components/pid/* @OttoWinter
+esphome/components/pmsa003i/* @sjtrny
 esphome/components/pn532/* @OttoWinter @jesserockz
 esphome/components/pn532_i2c/* @OttoWinter @jesserockz
 esphome/components/pn532_spi/* @OttoWinter @jesserockz
diff --git a/esphome/components/pmsa003i/__init__.py b/esphome/components/pmsa003i/__init__.py
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/esphome/components/pmsa003i/pmsa003i.cpp b/esphome/components/pmsa003i/pmsa003i.cpp
new file mode 100644
index 0000000000..1396c9f3d4
--- /dev/null
+++ b/esphome/components/pmsa003i/pmsa003i.cpp
@@ -0,0 +1,100 @@
+#include "pmsa003i.h"
+#include "esphome/core/log.h"
+
+namespace esphome {
+namespace pmsa003i {
+
+static const char *const TAG = "pmsa003i";
+
+void PMSA003IComponent::setup() {
+  ESP_LOGCONFIG(TAG, "Setting up pmsa003i...");
+
+  PM25AQIData data;
+  bool successful_read = this->read_data_(&data);
+
+  if (!successful_read) {
+    this->mark_failed();
+    return;
+  }
+}
+
+void PMSA003IComponent::dump_config() { LOG_I2C_DEVICE(this); }
+
+void PMSA003IComponent::update() {
+  PM25AQIData data;
+
+  bool successful_read = this->read_data_(&data);
+
+  // Update sensors
+  if (successful_read) {
+    this->status_clear_warning();
+    ESP_LOGV(TAG, "Read success. Updating sensors.");
+
+    if (this->standard_units_) {
+      if (this->pm_1_0_sensor_ != nullptr)
+        this->pm_1_0_sensor_->publish_state(data.pm10_standard);
+      if (this->pm_2_5_sensor_ != nullptr)
+        this->pm_2_5_sensor_->publish_state(data.pm25_standard);
+      if (this->pm_10_0_sensor_ != nullptr)
+        this->pm_10_0_sensor_->publish_state(data.pm100_standard);
+    } else {
+      if (this->pm_1_0_sensor_ != nullptr)
+        this->pm_1_0_sensor_->publish_state(data.pm10_env);
+      if (this->pm_2_5_sensor_ != nullptr)
+        this->pm_2_5_sensor_->publish_state(data.pm25_env);
+      if (this->pm_10_0_sensor_ != nullptr)
+        this->pm_10_0_sensor_->publish_state(data.pm100_env);
+    }
+
+    if (this->pmc_0_3_sensor_ != nullptr)
+      this->pmc_0_3_sensor_->publish_state(data.particles_03um);
+    if (this->pmc_0_5_sensor_ != nullptr)
+      this->pmc_0_5_sensor_->publish_state(data.particles_05um);
+    if (this->pmc_1_0_sensor_ != nullptr)
+      this->pmc_1_0_sensor_->publish_state(data.particles_10um);
+    if (this->pmc_2_5_sensor_ != nullptr)
+      this->pmc_2_5_sensor_->publish_state(data.particles_25um);
+    if (this->pmc_5_0_sensor_ != nullptr)
+      this->pmc_5_0_sensor_->publish_state(data.particles_50um);
+    if (this->pmc_10_0_sensor_ != nullptr)
+      this->pmc_10_0_sensor_->publish_state(data.particles_100um);
+  } else {
+    this->status_set_warning();
+    ESP_LOGV(TAG, "Read failure. Skipping update.");
+  }
+}
+
+bool PMSA003IComponent::read_data_(PM25AQIData *data) {
+  const uint8_t num_bytes = 32;
+  uint8_t buffer[num_bytes];
+
+  this->read_bytes_raw(buffer, num_bytes);
+
+  // https://github.com/adafruit/Adafruit_PM25AQI
+
+  // Check that start byte is correct!
+  if (buffer[0] != 0x42) {
+    return false;
+  }
+
+  // get checksum ready
+  int16_t sum = 0;
+  for (uint8_t i = 0; i < 30; i++) {
+    sum += buffer[i];
+  }
+
+  // The data comes in endian'd, this solves it so it works on all platforms
+  uint16_t buffer_u16[15];
+  for (uint8_t i = 0; i < 15; i++) {
+    buffer_u16[i] = buffer[2 + i * 2 + 1];
+    buffer_u16[i] += (buffer[2 + i * 2] << 8);
+  }
+
+  // put it into a nice struct :)
+  memcpy((void *) data, (void *) buffer_u16, 30);
+
+  return (sum == data->checksum);
+}
+
+}  // namespace pmsa003i
+}  // namespace esphome
diff --git a/esphome/components/pmsa003i/pmsa003i.h b/esphome/components/pmsa003i/pmsa003i.h
new file mode 100644
index 0000000000..10176218ed
--- /dev/null
+++ b/esphome/components/pmsa003i/pmsa003i.h
@@ -0,0 +1,68 @@
+#pragma once
+
+#include "esphome/core/component.h"
+#include "esphome/components/sensor/sensor.h"
+#include "esphome/components/i2c/i2c.h"
+
+namespace esphome {
+namespace pmsa003i {
+
+/**! Structure holding Plantower's standard packet **/
+// From https://github.com/adafruit/Adafruit_PM25AQI
+struct PM25AQIData {
+  uint16_t framelen;        ///< How long this data chunk is
+  uint16_t pm10_standard,   ///< Standard PM1.0
+      pm25_standard,        ///< Standard PM2.5
+      pm100_standard;       ///< Standard PM10.0
+  uint16_t pm10_env,        ///< Environmental PM1.0
+      pm25_env,             ///< Environmental PM2.5
+      pm100_env;            ///< Environmental PM10.0
+  uint16_t particles_03um,  ///< 0.3um Particle Count
+      particles_05um,       ///< 0.5um Particle Count
+      particles_10um,       ///< 1.0um Particle Count
+      particles_25um,       ///< 2.5um Particle Count
+      particles_50um,       ///< 5.0um Particle Count
+      particles_100um;      ///< 10.0um Particle Count
+  uint16_t unused;          ///< Unused
+  uint16_t checksum;        ///< Packet checksum
+};
+
+class PMSA003IComponent : public PollingComponent, public i2c::I2CDevice {
+ public:
+  void setup() override;
+  void dump_config() override;
+  void update() override;
+  float get_setup_priority() const override { return setup_priority::DATA; }
+
+  void set_standard_units(bool standard_units) { standard_units_ = standard_units; }
+
+  void set_pm_1_0_sensor(sensor::Sensor *pm_1_0) { pm_1_0_sensor_ = pm_1_0; }
+  void set_pm_2_5_sensor(sensor::Sensor *pm_2_5) { pm_2_5_sensor_ = pm_2_5; }
+  void set_pm_10_0_sensor(sensor::Sensor *pm_10_0) { pm_10_0_sensor_ = pm_10_0; }
+
+  void set_pmc_0_3_sensor(sensor::Sensor *pmc_0_3) { pmc_0_3_sensor_ = pmc_0_3; }
+  void set_pmc_0_5_sensor(sensor::Sensor *pmc_0_5) { pmc_0_5_sensor_ = pmc_0_5; }
+  void set_pmc_1_0_sensor(sensor::Sensor *pmc_1_0) { pmc_1_0_sensor_ = pmc_1_0; }
+  void set_pmc_2_5_sensor(sensor::Sensor *pmc_2_5) { pmc_2_5_sensor_ = pmc_2_5; }
+  void set_pmc_5_0_sensor(sensor::Sensor *pmc_5_0) { pmc_5_0_sensor_ = pmc_5_0; }
+  void set_pmc_10_0_sensor(sensor::Sensor *pmc_10_0) { pmc_10_0_sensor_ = pmc_10_0; }
+
+ protected:
+  bool read_data_(PM25AQIData *data);
+
+  bool standard_units_;
+
+  sensor::Sensor *pm_1_0_sensor_{nullptr};
+  sensor::Sensor *pm_2_5_sensor_{nullptr};
+  sensor::Sensor *pm_10_0_sensor_{nullptr};
+
+  sensor::Sensor *pmc_0_3_sensor_{nullptr};
+  sensor::Sensor *pmc_0_5_sensor_{nullptr};
+  sensor::Sensor *pmc_1_0_sensor_{nullptr};
+  sensor::Sensor *pmc_2_5_sensor_{nullptr};
+  sensor::Sensor *pmc_5_0_sensor_{nullptr};
+  sensor::Sensor *pmc_10_0_sensor_{nullptr};
+};
+
+}  // namespace pmsa003i
+}  // namespace esphome
diff --git a/esphome/components/pmsa003i/sensor.py b/esphome/components/pmsa003i/sensor.py
new file mode 100644
index 0000000000..ac26270cfc
--- /dev/null
+++ b/esphome/components/pmsa003i/sensor.py
@@ -0,0 +1,104 @@
+import esphome.codegen as cg
+import esphome.config_validation as cv
+from esphome.components import i2c, sensor
+from esphome.const import (
+    CONF_ID,
+    CONF_PM_1_0,
+    CONF_PM_2_5,
+    CONF_PM_10_0,
+    CONF_PMC_0_5,
+    CONF_PMC_1_0,
+    CONF_PMC_2_5,
+    CONF_PMC_10_0,
+    UNIT_MICROGRAMS_PER_CUBIC_METER,
+    ICON_CHEMICAL_WEAPON,
+    ICON_COUNTER,
+    DEVICE_CLASS_EMPTY,
+)
+
+CODEOWNERS = ["@sjtrny"]
+DEPENDENCIES = ["i2c"]
+
+pmsa003i_ns = cg.esphome_ns.namespace("pmsa003i")
+
+PMSA003IComponent = pmsa003i_ns.class_(
+    "PMSA003IComponent", cg.PollingComponent, i2c.I2CDevice
+)
+
+CONF_STANDARD_UNITS = "standard_units"
+UNIT_COUNTS_PER_100ML = "#/0.1L"
+CONF_PMC_0_3 = "pmc_0_3"
+CONF_PMC_5_0 = "pmc_5_0"
+
+CONFIG_SCHEMA = (
+    cv.Schema(
+        {
+            cv.GenerateID(): cv.declare_id(PMSA003IComponent),
+            cv.Optional(CONF_STANDARD_UNITS, default=True): cv.boolean,
+            cv.Optional(CONF_PM_1_0): sensor.sensor_schema(
+                UNIT_MICROGRAMS_PER_CUBIC_METER,
+                ICON_CHEMICAL_WEAPON,
+                2,
+                DEVICE_CLASS_EMPTY,
+            ),
+            cv.Optional(CONF_PM_2_5): sensor.sensor_schema(
+                UNIT_MICROGRAMS_PER_CUBIC_METER,
+                ICON_CHEMICAL_WEAPON,
+                2,
+                DEVICE_CLASS_EMPTY,
+            ),
+            cv.Optional(CONF_PM_10_0): sensor.sensor_schema(
+                UNIT_MICROGRAMS_PER_CUBIC_METER,
+                ICON_CHEMICAL_WEAPON,
+                2,
+                DEVICE_CLASS_EMPTY,
+            ),
+            cv.Optional(CONF_PMC_0_3): sensor.sensor_schema(
+                UNIT_COUNTS_PER_100ML, ICON_COUNTER, 0, DEVICE_CLASS_EMPTY
+            ),
+            cv.Optional(CONF_PMC_0_5): sensor.sensor_schema(
+                UNIT_COUNTS_PER_100ML, ICON_COUNTER, 0, DEVICE_CLASS_EMPTY
+            ),
+            cv.Optional(CONF_PMC_1_0): sensor.sensor_schema(
+                UNIT_COUNTS_PER_100ML, ICON_COUNTER, 0, DEVICE_CLASS_EMPTY
+            ),
+            cv.Optional(CONF_PMC_2_5): sensor.sensor_schema(
+                UNIT_COUNTS_PER_100ML, ICON_COUNTER, 0, DEVICE_CLASS_EMPTY
+            ),
+            cv.Optional(CONF_PMC_5_0): sensor.sensor_schema(
+                UNIT_COUNTS_PER_100ML, ICON_COUNTER, 0, DEVICE_CLASS_EMPTY
+            ),
+            cv.Optional(CONF_PMC_10_0): sensor.sensor_schema(
+                UNIT_COUNTS_PER_100ML, ICON_COUNTER, 0, DEVICE_CLASS_EMPTY
+            ),
+        }
+    )
+    .extend(cv.polling_component_schema("60s"))
+    .extend(i2c.i2c_device_schema(0x12))
+)
+
+TYPES = {
+    CONF_PM_1_0: "set_pm_1_0_sensor",
+    CONF_PM_2_5: "set_pm_2_5_sensor",
+    CONF_PM_10_0: "set_pm_10_0_sensor",
+    CONF_PMC_0_3: "set_pmc_0_3_sensor",
+    CONF_PMC_0_5: "set_pmc_0_5_sensor",
+    CONF_PMC_1_0: "set_pmc_1_0_sensor",
+    CONF_PMC_2_5: "set_pmc_2_5_sensor",
+    CONF_PMC_5_0: "set_pmc_5_0_sensor",
+    CONF_PMC_10_0: "set_pmc_10_0_sensor",
+}
+
+
+def to_code(config):
+    var = cg.new_Pvariable(config[CONF_ID])
+    yield cg.register_component(var, config)
+    yield i2c.register_i2c_device(var, config)
+
+    cg.add(var.set_standard_units(config[CONF_STANDARD_UNITS]))
+
+    for key, funcName in TYPES.items():
+
+        if key in config:
+            sens = yield sensor.new_sensor(config[key])
+            cg.add(getattr(var, funcName)(sens))
diff --git a/tests/test1.yaml b/tests/test1.yaml
index 0e81b19998..2bc767c885 100644
--- a/tests/test1.yaml
+++ b/tests/test1.yaml
@@ -675,6 +675,27 @@ sensor:
       name: 'Outside Pressure'
     address: 0x77
     update_interval: 15s
+  - platform: pmsa003i
+    pm_1_0:
+      name: "PMSA003i PM1.0"
+    pm_2_5:
+      name: "PMSA003i PM2.5"
+    pm_10_0:
+      name: "PMSA003i PM10.0"
+    pmc_0_3:
+      name: "PMSA003i PMC <0.3µm"
+    pmc_0_5:
+      name: "PMSA003i PMC <0.5µm"
+    pmc_1_0:
+      name: "PMSA003i PMC <1µm"
+    pmc_2_5:
+      name: "PMSA003i PMC <2.5µm"
+    pmc_5_0:
+      name: "PMSA003i PMC <5µm"
+    pmc_10_0:
+      name: "PMSA003i PMC <10µm"
+    address: 0x12
+    standard_units: True
   - platform: pulse_counter
     name: 'Pulse Counter'
     pin: GPIO12