Texarkana is the largest city and county seat of Miller County, Arkansas. It effectively functions as one half of a city which crosses a state line - the other half, the city of Texarkana, Texas, lies on the other side of State Line Avenue. According to 2006 Census Bureau estimates, the population of the city is 30,006, ranking it as the state's 12th largest city, behind Jacksonville. The city forms part of the core of the Texarkana, Texas -Texarkana, Arkansas Metropolitan Statistical Area, encompassing all of Bowie County, Texas and Miller County, Arkansas. Texarkana apartments for rent comparison page shows most up to date rent information on Texarkana apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.