St. Mary's County MD Information

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St. Mary's County Subdivisions

St. Mary's County MD Data & Demographics

Source: 2020-2024 American Community Survey 5-Year Estimates

POPULATION

Total Population 115,126 (100%)
Population Density 321 per sq mi
Diversity Index1 48
 
 

INCOME

Median Household Income $119,446
Per Capita Income $53,417
Median Home Value $407,600
 

HOUSING

Total HU (Housing Units) 46,385 (100%)
Owner Occupied HU 31,049 (66.9%)
Renter Occupied HU 11,387 (24.5%)
Vacant Housing Units 3,949 (8.5%)
 

HOUSEHOLDS

Total Households 42,436
Average Household Size 2.65
Family Households 30,136 (71.0%)
NOTES
  1. The Diversity Index estimates the likelihood that two persons chosen at random from the same area belong to different race or ethnic groups, based on five groups: Hispanic/Latino, Non-Hispanic White, Non-Hispanic Black, Non-Hispanic Asian, and Non-Hispanic Other/Multiracial. A value of 0 indicates the population belongs entirely to one group. Higher values indicate a more evenly mixed population. Calculated from U.S. Census Bureau ACS 5-year estimates (table B03002).

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St. Mary's County MD - Peer Comparisons by Rank and Percentile

The table below compares St. Mary's County to the other 24 counties / independent cities and county equivalents in Maryland by rank and percentile using 2020-2024 American Community Survey 5-Year Estimates data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 12 52nd
Population Density # 14 48th
Median Household Income # 7 74th
Per Capita Income # 8 70th
Diversity Index # 12 52nd

Additional comparisons and rankings can be made with a VERY EASY TO USE Maryland Census Data Comparison Tool.

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Compare Maryland 2020-2024 American Community Survey 5-Year Estimates Data
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