Counties in Massachusetts by housing units

Middlesex County had the highest housing units of 14 counties in 2023, at 660,814. Nantucket County had the lowest, at 12,449. The median was 206,932 and the figure for Massachusetts was 3.01 million. Source: the U.S. Census Bureau.

Highest660,814Middlesex County

Lowest12,449Nantucket County

Median206,93214 counties

Massachusetts3,014,657History

Map of counties, 2023

Under 54K
54K to 170K
170K to 240K
240K to 340K
340K and over

count, 2023. 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, 2023

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	2023 count	Change on 2022
1	Middlesex County	660,814	+0.3%
2	Suffolk County	353,930	+1%
3	Worcester County	353,405	+0.5%
4	Essex County	328,460	+0.5%
5	Norfolk County	293,420	+0.7%
6	Bristol County	244,166	+0.4%
7	Plymouth County	216,654	+0.8%
8	Hampden County	197,210	+0.1%
9	Barnstable County	165,661	+0.4%
10	Berkshire County	69,861	+0.1%
11	Hampshire County	66,490	+0.5%
12	Franklin County	34,424	+0.1%
13	Dukes County	17,713	+0.5%
14	Nantucket County	12,449	+1.3%

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/2023/table-based-SF/data/5YRData/acsdt5y2023-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 Massachusetts by housing units, 2023) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b25001.dat

MLA 9

American Community Survey 5-year estimates, table B25001: total housing units, Counties in Massachusetts by housing units, 2023. U.S. Census Bureau, 29 Jan. 2026, https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b25001.dat. Invokely, https://invokely.ai/rankings/housing-units/massachusetts-counties?period=2023. 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 Massachusetts by housing units, 2023. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b25001.dat. Also distributed by Invokely, https://invokely.ai/rankings/housing-units/massachusetts-counties?period=2023.

Harvard

U.S. Census Bureau (2026) American Community Survey 5-year estimates, table B25001: total housing units, Counties in Massachusetts by housing units, 2023 [Dataset]. Available at: https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b25001.dat, via Invokely: https://invokely.ai/rankings/housing-units/massachusetts-counties?period=2023 (Accessed: 12 October 2026).

BibTeX

@misc{census_counties_in_massachusetts_by_2023,
  author = {{U.S. Census Bureau}},
  title = {{American Community Survey 5-year estimates, table B25001: total housing units: Counties in Massachusetts by housing units, 2023}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b25001.dat},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/housing-units/massachusetts-counties?period=2023. 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/2023/table-based-SF/data/5YRData/acsdt5y2023-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 Massachusetts by housing units, 2023
PY  - 2026
DA  - 2026/01/29
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b25001.dat
L2  - https://invokely.ai/rankings/housing-units/massachusetts-counties?period=2023
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/housing-units/massachusetts-counties?period=2023.
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/2023/table-based-SF/data/5YRData/acsdt5y2023-b25001.dat. Retrieved 2026-10-12.
ER  -

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Questions

Which county has the highest housing units?

Middlesex County, with 660,814 in 2023, according to the U.S. Census Bureau.

Which county has the lowest housing units?

Nantucket County, with 12,449 in 2023.

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.