Tarrant County, TX is 897 sq miles (2,323 km²).
Galveston County, Texas, USA - 873 square miles.
Rockwall County: 129 square miles.
Brewster County, Texas has the largest area of all Texas counties - 6,193 square miles.
* Dallas County Arkansas is 668 square miles. * Dallas County Texas 908 square miles.
Brewster is the largest county in Texas with 6,193 square miles of total area.
Brewster County is the largest county in Texas at 6,193 square miles.
The area of Travis County is 989 square miles.
About 6,193 square miles.
Texas Counties and County Trivia: Texas has some large counties like its largest Brewster County at 6,193 square miles. Texas has no county that fits into the 25 largest counties (or equivalent units) in the US, with seven Alaska counties at 12,750 square miles each or larger.Pecos County at 4,764 square miles.Hudspeth County at 4,571 square miles.Presido County at 3,856 square miles.Webb County at 3,357 square miles.Val Verde County at 3,171 square miles.