
Grand Coteau
- County:
- St. Landry Parish
- County Seat:
- No
- Area (mi²):
- 2.423
- State:
- Louisiana
Grand Coteau is a town located in St. Landry Parish, Louisiana. Grand Coteau has a 2025 population of 757. Grand Coteau is currently declining at a rate of -0.39% annually and its population has decreased by -1.94% since the most recent census, which recorded a population of 772 in 2020.
The average household income in Grand Coteau is $48,047 with a poverty rate of 37.01%. The median age in Grand Coteau is 54.2 years: 56.3 years for males, and 51.1 years for females.