A city limits sign, glimpsed in the 3rd season episode "Hank's Cowboy Movie," gives Arlen's population as 145,900.
Wichita Falls is a city of 103,000 in north Texas. It did host the Dallas Cowboys training camp from 1998-2002, the Cowboys went through several different towns/sites and (as of 2022) the camp is in Frisco, Texas (population 215,000).