Bay St. Louis, Mississippi

Bay St. Louis population, 2020 to 2024

Bay St. Louis added 1,090 residents from July 2020 to July 2024, a change of +11.6%. In the latest year it moved by +24. Among 61 Mississippi places of 5,000 or more, that growth ranks 2nd; the median place changed by -1.3%. The median place of 5,000+ in Mississippi has 12,656 people, so Bay St. Louis is 83% of it.

Bay St. Louis covers 14.69 square miles of land and 11.93 of water, for 717 people per square mile of land. The median Mississippi place of 5,000+ has 738, so Bay St. Louis is close to the typical town.

What county Bay St. Louis is in

All of Bay St. Louis's residents live in Hancock County, which had 46,492 residents in 2024. Bay St. Louis holds 22.6% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Bay St. Louis

1 ZIP Code Tabulation Area (ZCTA) overlaps Bay St. Louis by at least 10% of the ZCTA's or the city's land: 39520. ZCTAs are Census approximations of USPS ZIP code delivery areas. The list comes from the 2020 ZCTA to place relationship file, so a city that annexed land after 2020 may reach into ZIP codes not listed here.

Where Bay St. Louis is

The Census internal point of Bay St. Louis is at 30.323400, -89.358800. Jackson, the capital, is 145.0 miles NNW in a straight line. The nearest larger place is Long Beach, MS (17,217 people), 11.9 miles away. The nearest city of 100,000 or more is New Orleans, LA, 39.1 miles away.

Daylight in Bay St. Louis

At 30.32° N, Bay St. Louis gets about 14 h 06 min of daylight around the June solstice and 10 h 11 min around the December solstice, a swing of 3 h 55 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Bay St. Louis

The eight nearest incorporated places of 1,000+ in Mississippi, measured between internal points. The closest is Waveland, 2.8 miles away, with 7,043 people.