Mill Plain, Fairfield, Connecticut

{{For|the community in Danbury|Mill Plain, Danbury, Connecticut}}

{{Use mdy dates|date=July 2023}}

{{Infobox settlement

|official_name = Mill Plain, Connecticut

|settlement_type = Census-designated place

|image_skyline =

|imagesize =

|image_caption =

|pushpin_map = Connecticut#USA

|pushpin_label = Mill Plain

|pushpin_label_position =

|pushpin_map_caption =

|coordinates = {{coord|41|9|0|N|73|16|9|W|region:US-CT|display=inline,title}}

|subdivision_type = Country

|subdivision_name = {{US}}

|subdivision_type1 = State

|subdivision_name1 = Connecticut

|subdivision_type2 = County

|subdivision_name2 = Fairfield

|subdivision_type3 = Town

|subdivision_name3 = Fairfield

|established_title =

|established_date =

| area_footnotes = {{cite web |title=2020 U.S. Gazetteer Files – Connecticut |url=https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2020_Gazetteer/2020_gaz_place_09.txt |publisher=United States Census Bureau |access-date=April 7, 2021}}

| area_total_sq_mi =

| area_land_sq_mi =

| area_water_sq_mi =

| area_total_km2 = 1.31

| area_land_km2 = 1.26

| area_water_km2 = 0.05

| area_water_percent =

| population_as_of = 2020

| population_footnotes =

| population_total =

| population_density_km2 =

|timezone = Eastern (EST)

|utc_offset = -5

|timezone_DST = EDT

|utc_offset_DST = -4

|elevation_footnotes =

|elevation_m =

|elevation_ft = 25

|postal_code_type = ZIP Code

|postal_code = 06824 (Fairfield)

|area_code = 203/475

|blank_name = FIPS code

|blank_info = 09-47990

|blank1_name = GNIS feature ID

|blank1_info = 2805956{{Cite gnis|2805956|Mill Plain Census Designated Place}}

|website =

|footnotes =

}}

Mill Plain is a census-designated place (CDP) in the town of Fairfield, Fairfield County, Connecticut, United States. It is in the southern part of the town, directly north of the downtown area of Fairfield and northeast of Southport. It is bordered to the west by the Mill River, to the south by Interstate 95, to the east by Mill Plain Road, and to the north by Duck Farm Road.

Mill Plain was first listed as a CDP prior to the 2020 census.