Dimmitt is a city located in Castro County Texas. It is also the county seat of Castro County. With a 2020 population of 4,027, it is the 421st largest city in Texas and the 5392nd largest city in the United States . Dimmitt is currently declining at a rate of -0.89% annually and its population has decreased by -8.33% since the most recent census, which recorded a population of 4,393 in 2010. Dimmitt reached it's highest population of 5,019 in 1980. Spanning over 3 miles, Dimmitt has a population density of 1,278 people per square mile.
The average household income in Dimmitt is $62,692 with a poverty rate of 12.93%. The median rental costs in recent years comes to $644 per month, and the median house value is $81,700. The median age in Dimmitt is 34.8 years, 34.8 years for males, and 34.6 years for females.