RANKING · 2024 ACS · 24 SHOWN OF 24

Largest households, Maryland counties

Maryland counties ranked by average household size (2024 ACS). This list covers the 24 counties in Maryland that qualify, ranked against each other statewide. The median across all 24 is 2.57. Biggest climber in the top 100 since 2020: Frederick County, MD, up 5 places to #5.

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SAME RANKING BYCities States Metros ZIP codes

RELATEDMost expensive homes Cheapest homes Highest median rent Lowest median rent Highest homeownership rate Highest renter share

YEAR2010 2020 2024

RANKPLACESTATEPOPAVERAGE HOUSEHOLD SIZEVS 2010

01▲1Calvert County, MDMD94,4842.80−2%

02▲2Charles County, MDMD176,5932.78−3%

03▲2Howard County, MDMD339,1832.76+2%

04▼1Montgomery County, MDMD1,074,5822.72+2%

05▲5Frederick County, MDMD302,8832.70+1%

06▼5Prince George's County, MDMD970,3742.70−2%

07▲1Carroll County, MDMD176,6772.66−3%

08▼1Caroline County, MDMD34,1162.65−3%

09St. Mary's County, MDMD116,6922.65−3%

10▲2Anne Arundel County, MDMD603,3802.600%

11▲2Queen Anne's County, MDMD54,4482.58−4%

12▼1Harford County, MDMD266,4462.57−4%

13▼7Cecil County, MDMD107,1312.54−7%

14▲1Baltimore County, MDMD847,6502.50+1%

15▼1Wicomico County, MDMD106,8992.49−3%

16Washington County, MDMD157,7312.48−2%

17▲1Dorchester County, MDMD33,6282.380%

18▲1Somerset County, MDMD24,9732.38+1%

19▲4Talbot County, MDMD38,2382.28−4%

20Allegany County, MDMD66,8482.23−5%

21▲1Garrett County, MDMD28,3702.22−8%

22▼1Worcester County, MDMD54,4592.19−5%

23▼6Baltimore, MDMD569,9972.16−14%

24Kent County, MDMD19,5652.09−13%

SHOWING 1–24 OF 24

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES