St. Mary Parish LA Information


St. Mary Parish Subdivisions

St. Mary Parish LA Data & Demographics (As of July 1, 2017)


Total Population 54,463
Daytime Population: Workers 23,123
Daytime Population: Residents 36,192
Total Daytime Population (TDP) 59,315
Ratio TDP/Total Population1 1.09
Population in Households 53,595
Population in Familes 44,001
Population in Group Qrtrs 868
Population Density2 98
Diversity Index3 62


Median Household Income $37,352
Average Household Income $55,032
Per Capita Income $21,078


Total Housing Units 23,516 (100%)
Owner Occupied HU 13,597 (57.8%)
Renter Occupied HU 6,939 (29.5%)
Vacant Housing Units 2,980 (12.7%)
Median Home Value $103,924
Average Home Value $134,688


Total Households 20,536
Average Household Size 2.61
Family Households 13,972
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. 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.


2010-2017 2017-2022
Population -0.05% -0.35%
Households 0.05% -0.29%
Families -0.2% -0.46%
Median Household Income   2.03%
Per Capita Income   2.35%


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, 2017 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 # 22 67th
Population Density # 20 70th
Diversity Index # 2 98th
Median Household Income # 43 34th
Per Capita Income # 43 34th

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