St. Mary's County MD Information

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St. Mary's County Subdivisions

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  1. St. Mary's County 2019 Demographic Data
  2. Growth Rates forSt. Mary's County (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. Maryland Research Tools (Easy Tools & Current Data)
  3. Maryland Data Comparison Tool - 2019 Demographics

St. Mary's County MD Data & Demographics (As of July 1, 2019)

POPULATION

Total Population 116,389
Population in Households 113,610
Population in Familes 95,279
Population in Group Qrtrs 2,779
Population Density 326
Diversity Index1 46
 

INCOME

Median Household Income $83,151
Average Household Income $107,434
Per Capita Income $38,393
Wealth Index3 136

HOUSING

Total Housing Units 46,528 (100%)
Owner Occupied HU 29,669 (63.8%)
Renter Occupied HU 11,870 (25.5%)
Vacant Housing Units 4,989 (10.7%)
Median Home Value $322,041
Housing Affordability Index2 124
 

HOUSEHOLDS

Total Households 41,539
Average Household Size 2.74
Family Households 29,604
Average Family Size 3
NOTES
  1. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
  2. The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
  3. The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.

GROWTH RATE / YEAR

2010-2019 2019-2024
Population 1.1% 0.98%
Households 1.08% 0.96%
Families 0.97% 0.88%
Median Household Income   1.62%
Per Capita Income   2.09%

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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 July 1, 2019 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 54th
Population Density # 13 50th
Diversity Index # 13 50th
Median Household Income # 9 67th
Per Capita Income # 12 54th

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

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Maryland Census Data Comparison Tool

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