Counties in Maine by housing units

Cumberland County had the highest housing units of 16 counties in 2021, at 148,178. Piscataquis County had the lowest, at 14,673. The median was 33,035 and the figure for Maine was 737,782. Source: the U.S. Census Bureau.

Highest148,178Cumberland County

Lowest14,673Piscataquis County

Median33,03516 counties

Maine737,782History

Map of counties, 2021

Under 22K
22K to 24K
24K to 38K
38K to 63K
63K and over

count, 2021. Source: U.S. Census Bureau, American Community Survey 5-year estimates, table B25001: total housing units. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2021

count. Source: U.S. Census Bureau, American Community Survey 5-year estimates, table B25001: total housing units. Retrieved 2026-10-12.

Full ranking

Rank	Counties	2021 count
1	Cumberland County	148,178
2	York County	111,552
3	Penobscot County	74,904
4	Kennebec County	62,538
5	Androscoggin County	49,769
6	Hancock County	40,197
7	Aroostook County	38,485
8	Oxford County	36,176
9	Somerset County	29,894
10	Knox County	24,247
11	Lincoln County	23,587
12	Waldo County	21,928
13	Washington County	21,795
14	Franklin County	20,979
15	Sagadahoc County	18,880
16	Piscataquis County	14,673

Other periods

2024
2023
2022
2021

About this ranking

All housing units, occupied and vacant: houses, apartments, mobile homes and rooms intended as separate living quarters. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

A survey estimate averaged over five years, not a count on one date.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. American Community Survey 5-year estimates, table B25001: total housing units. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25001.dat. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

U.S. Census Bureau. (2026). American Community Survey 5-year estimates, table B25001: total housing units (Counties in Maine by housing units, 2021) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25001.dat

MLA 9

American Community Survey 5-year estimates, table B25001: total housing units, Counties in Maine by housing units, 2021. U.S. Census Bureau, 29 Jan. 2026, https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25001.dat. Invokely, https://invokely.ai/rankings/housing-units/maine-counties?period=2021. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. American Community Survey 5-year estimates, table B25001: total housing units. Counties in Maine by housing units, 2021. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25001.dat. Also distributed by Invokely, https://invokely.ai/rankings/housing-units/maine-counties?period=2021.

Harvard

U.S. Census Bureau (2026) American Community Survey 5-year estimates, table B25001: total housing units, Counties in Maine by housing units, 2021 [Dataset]. Available at: https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25001.dat, via Invokely: https://invokely.ai/rankings/housing-units/maine-counties?period=2021 (Accessed: 12 October 2026).

BibTeX

@misc{census_counties_in_maine_by_2021,
  author = {{U.S. Census Bureau}},
  title = {{American Community Survey 5-year estimates, table B25001: total housing units: Counties in Maine by housing units, 2021}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25001.dat},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/housing-units/maine-counties?period=2021. Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B25001: total housing units. https://www2.census.gov/programs-surveys/acs/summary\_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25001.dat. Retrieved 2026-10-12.},
}

RIS

TY  - DATA
AU  - U.S. Census Bureau
TI  - American Community Survey 5-year estimates, table B25001: total housing units: Counties in Maine by housing units, 2021
PY  - 2026
DA  - 2026/01/29
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25001.dat
L2  - https://invokely.ai/rankings/housing-units/maine-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/housing-units/maine-counties?period=2021.
N1  - Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B25001: total housing units. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25001.dat. Retrieved 2026-10-12.
ER  -

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Questions

Which county has the highest housing units?

Cumberland County, with 148,178 in 2021, according to the U.S. Census Bureau.

Which county has the lowest housing units?

Piscataquis County, with 14,673 in 2021.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, American Community Survey 5-year estimates, table B25001: total housing units. Retrieved 2026-10-12.