Marlin is a city located in Falls County Texas. It is also the county seat of Falls County. With a 2020 population of 5,587, it is the 339th largest city in Texas and the 4463rd largest city in the United States . Marlin is currently growing at a rate of 0.05% annually but its population has decreased by -6.37% since the most recent census, which recorded a population of 5,967 in 2010. Marlin reached it's highest population of 7,099 in 1950. Spanning over 5 miles, Marlin has a population density of 1,237 people per square mile.
The average household income in Marlin is $28,915 with a poverty rate of 47.13%. The median rental costs in recent years comes to $452 per month, and the median house value is $49,900. The median age in Marlin is 35.5 years, 31.4 years for males, and 35.9 years for females.