Monroe
- County:
- Ouachita Parish
- County Seat:
- No
- Area (mi²):
- 29.913
- State:
- Louisiana
Monroe is a city located in Ouachita Parish, Louisiana. Monroe has a 2026 population of 46,622. Monroe is currently declining at a rate of -0.1% annually and its population has decreased by -2.1% since the most recent census, which recorded a population of 47,620 in 2020.