Tarrant_County,_Texas | largestCity | Fort_Worth,_Texas Texas | capital | Austin,_Texas Arlington,_Texas | isPartOf | Tarrant_County,_Texas Arlington,_Texas | isPartOf | Texas Tarrant_County,_Texas | country | United_States
Arlington is in Tarrant County, where the largest city is Fort Worth. Tarrant County is in Texas (capital, Austin), in the United States.