Texarkana is the largest city and the county seat of Miller County, Arkansas, United States. 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 29,856 ranking it as the state's 13th largest city, behind West Memphis. The city, along with its Texas counterpart, forms the core of the Texarkana, Texas–Texarkana, Arkansas Metropolitan Statistical Area, encompassing all of Bowie County, Texas and Miller County, Arkansas.

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