St. Mary's County MD Data & Peer Group Rankings

St. Mary's County MD Data & Demographics (As of July 1, 2020)

POPULATION
Total Population	116,779 (100%)
Population in Households	113,988 (97.6%)
Population in Families	95,453 (81.7%)
Population in Group Quarters¹	2,791 ( 2.4%)
Population Density	327
Diversity Index²	46


INCOME
Median Household Income	$98,149
Average Household Income	$114,093
% of Income for Mortgage⁴	14%
Per Capita Income	$40,912
Wealth Index⁵	138

HOUSING
Total HU (Housing Units)	47,067 (100%)
Owner Occupied HU	29,966 (63.7%)
Renter Occupied HU	11,857 (25.2%)
Vacant Housing Units	5,244 (11.1%)
Median Home Value	$319,329
Average Home Value	$359,214
Housing Affordability Index³	168

HOUSEHOLDS
Total Households	41,823
Average Household Size	2.73
Family Households	29,761
Average Family Size	3

NOTES

Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
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 races 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.
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.
The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
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	2010-2020	2020-2025
Population	1.03%	0.89%
Households	1.04%	0.89%
Families	0.92%	0.81%
Median Household Income		0.86%
Per Capita Income		1.69%
Owner Occupied HU		1.02%

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, 2020 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
Median Household Income	# 6	79th
Housing Affordability Index	# 24	100th
Per Capita Income	# 12	54th
Diversity Index	# 13	50th

Variable Description

Rank

Percentile

Total Population

# 12

54th

Population Density

# 13

50th

Median Household Income

# 6

79th

Housing Affordability Index

# 24

100th

Per Capita Income

# 12

54th

Diversity Index

# 13

50th

Maryland Census Data Comparison Tool

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St. Mary's County MD Information

St. Mary's County MD Data & Demographics (As of July 1, 2020)

POPULATION

INCOME

HOUSING

HOUSEHOLDS

GROWTH RATE / YEAR

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

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