
Marlin
- County:
- Falls County
- County Seat:
- Yes
- Area (mi²):
- 4.517
- State:
- Texas
Marlin is a city located in Falls County, Texas. Marlin has a 2025 population of 5,642. It is also the county seat of Falls County. Marlin is currently growing at a rate of 0.71% annually and its population has increased by 3.64% since the most recent census, which recorded a population of 5,444 in 2020.
The average household income in Marlin is $50,900 with a poverty rate of 18.21%. The median age in Marlin is 36.8 years: 31.5 years for males, and 40.9 years for females.