St. Mary Parish LA Information

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St. Mary Parish Subdivisions

St. Mary Parish LA Data & Demographics (As of July 1, 2024)

POPULATION

Total Population 47,073 (100%)
Population in Households 46,399 (98.6%)
Population in Families 38,408 (81.6%)
Population in Group Quarters1 674 ( 1.4%)
Population Density 84
Diversity Index2 68
 
 

INCOME

Median Household Income $48,516
Average Household Income $66,951
% of Income for Mortgage4 18%
Per Capita Income $26,799
Wealth Index5 50
Socioeconomic Status Index6 Low (43.2)
 

HOUSING

Total HU (Housing Units) 22,101 (100%)
Owner Occupied HU 13,095 (59.3%)
Renter Occupied HU 5,705 (25.8%)
Vacant Housing Units 3,301 (14.9%)
Median Home Value $142,913
Average Home Value $205,815
Housing Affordability Index3 143
 

HOUSEHOLDS

Total Households 18,800
Average Household Size 2.47
Family Households 12,129
Average Family Size 3.00
NOTES
  1. 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.
  2. 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.
  3. 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.
  4. 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).
  5. 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.
  6. The Socioeconomic Index ranges from zero (lowest relative status) to 100 (highest relative status). This measure quantifies disparities in social position of an area's inhabitants and is built from a broad range of demographic, housing, and socioeconomic inputs. More information on this measure can be found in Esri's SEI tutorial.

GROWTH RATE / YEAR

2020-2024 2024-2029
Population -1.13% -0.95%
Households -0.64% -0.30%
Families   -0.51%
Median Household Income   2.84%
Per Capita Income   3.18%
Owner Occupied HU   0.30%

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St. Mary Parish LA - Peer Comparisons by Rank and Percentile

The table below compares St. Mary Parish to the other 64 parishes and parish equivalents in Louisiana by rank and percentile using July 1, 2024 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 # 23 66th
Population Density # 24 64th
Median Household Income # 37 44th
Housing Affordability Index # 46 72nd
Per Capita Income # 42 36th
Diversity Index # 3 97th

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

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