Texarkana, Texas, is located at the Junction of Interstate 30 and US highways 59,67,71, and 82 in extreme northeast Texas on the Texas-Arkansas border.It is in the Central time zone. Texarkana is the headquarters of the theologically conservative American Baptist Association, whose Missionary Baptist churches are most numerous in Texas, Arkansas, Louisiana, Oklahoma, and Mississippi. Texarkana is a city in Bowie County, Texas, United States. It effectively functions as one half of a city which crosses a state line the other half, the city of Texarkana, Arkansas, lies on the other side of State Line Avenue. The population of the city is 34,782 at the 2000 census. The city, along with its Arkansas counterpart, forms the core of the Texarkana, TexasTexarkana, Arkansas Metropolitan Statistical Area, encompassing all of Bowie County, Texas and Miller County, Arkansas.