Counties in New Mexico by average household size
McKinley County had the highest average household size of 33 counties in 2023, at 3.3 persons per household. Sierra County had the lowest, at 2.1 persons per household. The median was 2.6 persons per household and the figure for New Mexico was 2.5 persons per household. Source: the U.S. Census Bureau.
Map of counties, 2023
- Under 2.2
- 2.2 to 2.4
- 2.4 to 2.6
- 2.6 to 2.7
- 2.7 to 2.8
- 2.8 and over
All counties, 2023
Full ranking
| Rank | Counties | 2023 | Change on 2022 |
|---|---|---|---|
| 1 | McKinley County | 3.3 | -2.1% |
| 2 | Cibola County | 3.1 | -4.1% |
| 3 | Socorro County | 3 | -6.6% |
| 4 | San Juan County | 2.9 | -0.3% |
| 5 | Lea County | 2.9 | -0.3% |
| 6 | Valencia County | 2.8 | -1% |
| 7 | Luna County | 2.7 | -1.8% |
| 8 | Sandoval County | 2.7 | -0.4% |
| 9 | Guadalupe County | 2.7 | -8.9% |
| 9 | Hidalgo County | 2.7 | +2.7% |
| 11 | Otero County | 2.7 | -1.1% |
| 12 | Harding County | 2.7 | -4% |
| 12 | Rio Arriba County | 2.7 | -6% |
| 14 | Torrance County | 2.6 | -2.6% |
| 15 | Chaves County | 2.6 | -1.9% |
| 16 | Doña Ana County | 2.6 | -1.1% |
| 16 | Eddy County | 2.6 | -3% |
| 18 | Curry County | 2.5 | -0.4% |
| 19 | Roosevelt County | 2.5 | -4.2% |
| 20 | Grant County | 2.4 | +1.7% |
| 21 | Union County | 2.4 | -2% |
| 22 | Taos County | 2.4 | -4.8% |
| 23 | Los Alamos County | 2.4 | 0% |
| 24 | Bernalillo County | 2.3 | -1.3% |
| 25 | Santa Fe County | 2.2 | -1.3% |
| 26 | Colfax County | 2.2 | +1.4% |
| 26 | San Miguel County | 2.2 | -3.1% |
| 28 | De Baca County | 2.2 | -5.3% |
| 29 | Lincoln County | 2.1 | -3.6% |
| 30 | Catron County | 2.1 | -1.4% |
| 31 | Mora County | 2.1 | +4% |
| 32 | Quay County | 2.1 | -8.8% |
| 32 | Sierra County | 2.1 | -2.3% |
Other periods
About this ranking
Average number of persons per private household. EU countries: EU-SILC. United States: American Community Survey five-year estimate of people in households divided by occupied housing units, where the period shown is the last year of the five-year span.
Covers private households only; people living in institutions or other group quarters are excluded. EU-SILC figures refer to the survey year. The EU and US surveys differ, so their figures are not strictly comparable.
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 B25010: average household size of occupied housing units. https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b25010.dat. Retrieved 2026-10-12.Citation styles
APA 7
U.S. Census Bureau. (2026). American Community Survey 5-year estimates, table B25010: average household size of occupied housing units (Counties in New Mexico by average household size, 2023) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b25010.dat
MLA 9
American Community Survey 5-year estimates, table B25010: average household size of occupied housing units, Counties in New Mexico by average household size, 2023. U.S. Census Bureau, 29 Jan. 2026, https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b25010.dat. Invokely, https://invokely.ai/rankings/average-household-size/new-mexico-counties?period=2023. Accessed 12 Oct. 2026.
Chicago (author-date)
U.S. Census Bureau. 2026. American Community Survey 5-year estimates, table B25010: average household size of occupied housing units. Counties in New Mexico by average household size, 2023. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b25010.dat. Also distributed by Invokely, https://invokely.ai/rankings/average-household-size/new-mexico-counties?period=2023.
Harvard
U.S. Census Bureau (2026) American Community Survey 5-year estimates, table B25010: average household size of occupied housing units, Counties in New Mexico by average household size, 2023 [Dataset]. Available at: https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b25010.dat, via Invokely: https://invokely.ai/rankings/average-household-size/new-mexico-counties?period=2023 (Accessed: 12 October 2026).
BibTeX
@misc{census_counties_in_new_mexico_2023,
author = {{U.S. Census Bureau}},
title = {{American Community Survey 5-year estimates, table B25010: average household size of occupied housing units: Counties in New Mexico by average household size, 2023}},
year = {2026},
howpublished = {Data set},
url = {https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b25010.dat},
urldate = {2026-10-12},
note = {Accessed via Invokely, https://invokely.ai/rankings/average-household-size/new-mexico-counties?period=2023. Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B25010: average household size of occupied housing units. https://www2.census.gov/programs-surveys/acs/summary\_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b25010.dat. Retrieved 2026-10-12.},
}
RIS
TY - DATA
AU - U.S. Census Bureau
TI - American Community Survey 5-year estimates, table B25010: average household size of occupied housing units: Counties in New Mexico by average household size, 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-b25010.dat
L2 - https://invokely.ai/rankings/average-household-size/new-mexico-counties?period=2023
Y2 - 2026/10/12
N1 - Accessed via Invokely, https://invokely.ai/rankings/average-household-size/new-mexico-counties?period=2023.
N1 - Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B25010: average household size of occupied housing units. https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b25010.dat. Retrieved 2026-10-12.
ER -
Use this data in your AI agent
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Rank Counties in New Mexico by average household size using official data, and cite the source.
rank_places {"indicator":"average_household_size","level":"province","within":"New Mexico","limit":10}
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Which county has the highest average household size?
McKinley County, with 3.3 persons per household in 2023, according to the U.S. Census Bureau.
Which county has the lowest average household size?
Sierra County, with 2.1 persons per household 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 B25010: average household size of occupied housing units. Retrieved 2026-10-12.
Average household size: other rankings
- Counties in Wyoming
- Counties in Nevada
- Counties in Indiana
- Cities in Kentucky
- Cities in Massachusetts
- Cities in Mississippi
Counties in New Mexico: more rankings
- County house price annual change, sales and refinances
- Homeownership rate (US, housing units)
- Fair Market Rent, two bedrooms (HUD, monthly)
- Housing units authorized by building permits
- Female population share
- Population speaking Spanish at home
- Median age on 1 July (US county estimates)
- Foreign-born population share