Crystal City is a city located in Zavala County Texas. It is also the county seat of Zavala County. With a 2020 population of 6,966, it is the 303rd largest city in Texas and the 3963rd largest city in the United States . Crystal City is currently declining at a rate of -1.36% annually and its population has decreased by -2.41% since the most recent census, which recorded a population of 7,138 in 2010. Crystal City reached it's highest population of 9,101 in 1960. Spanning over 4 miles, Crystal City has a population density of 1,911 people per square mile.
The average household income in Crystal City is $41,777 with a poverty rate of 26.74%. The median rental costs in recent years comes to $589 per month, and the median house value is $48,300. The median age in Crystal City is 30.5 years, 29.9 years for males, and 31.3 years for females.