Is St. Mary Parish the best Louisiana county for your business?

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St. Mary Parish Population

All St. Mary Parish population data above are from the US Census Bureau.

The population data for St. Mary Parish are from the Census' American Community Survey 2017 5-year estimates and the Census' 2018 Population Estimates. The demographic data for Jefferson Davis Parish, Lincoln Parish, Sabine Parish, and Vernon Parish are the most current, comparable demographics available from the US Census Bureau, are from the American Community Survey 2017 5-year estimates, and were downloaded on 6 December 2018. Check out our FAQ section for more details.

St. Mary Parish Demographics Summary

population icon Population

With 49,774 people, St. Mary Parish is the 22nd most populated county in the state of Louisiana out of 64 counties. But watch out, St. Mary Parish, because Lincoln Parish with 47,196 people and Vernon Parish with 48,860 people are right behind you.

race icon Race & Ethnicity

The largest St. Mary Parish racial/ethnic groups are White (56.1%) followed by Black (30.9%) and Hispanic (6.8%).

income icon Median Income

In 2017, the median household income of St. Mary Parish residents was $41,345. St. Mary Parish households made slightly more than Jefferson Davis Parish households ($40,744) and Sabine Parish households ($40,695) . However, 19.5% of St. Mary Parish residents live in poverty.

age icon Median Age

The median age for St. Mary Parish residents is 38.0 years young.


86% of people CANNOT find the data they're looking for on the US Census Bureau website. Source: Nielsen Norman Group

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