tarrant_county,_texas | countyseat | fort_worth,_texas <tsp> arlington,_texas | ispartof | tarrant_county,_texas <tsp> arlington,_texas | ispartof | texas <tsp> tarrant_county,_texas | country | united_states <tsp> texas | largestcity | houston <sep> tarrant county is located in the us state of texas as of 2020, it had a population of 2,110,640 it is texas' third-most populous county and the 15th-most populous in the united states its county seat is fort worth 
texas in the united states has houston as its largest city. tarrant county can be found within texas and is home to arlington and the county seat of forth worth.it is texas' third-most populous county and the 15th-most populous in the united states