PART I TEXAS COUNTY FORMATION 1836- 1849:

1836

BASTROP COUNTY formed in 1836 from Old Mexican Municipality; the county seat is Bastrop.

BEXAR COUNTY formed in 1836 from Old Mexican Municipality; the county seat is San Antonio.

BRAZORIA COUNTY formed in 1836 from Old Mexican Municipality; the county seat is Angleton.

GOLIAD COUNTY formed in 1836 from Old Mexican Municipality; the county seat is Goliad.

GONZALES COUNTY formed in 1836 from Old Mexican Municipality; the county seat is Gonzales.

HARRIS COUNTY formed in 1836 from Harrisburg Municipality; the county seat is Houston.

JACKSON COUNTY formed in 1836 from Old Mexican Municipality; the county seat is Edna.

JASPER COUNTY formed in 1836 from Old Mexican Municipality; the county seat is Jasper.

JEFFERSON COUNTY formed in 1836 from Old Mexican Municipality; the county seat is Beaumont.

LIBERTY COUNTY formed in 1836 from Old Spanish Municipality; the county seat Liberty.

MATAGORDA COUNTY formed in 1836 from Old Mexican Municipality; the county seat Bay City.

MILAM COUNTY formed in 1836 from Old Mexican Municipality; the county seat is Cameron.

NACOGDOCHES COUNTY formed in 1836 from Old Mexican Municipality; the county seat is Nacogdoches.

RED RIVER COUNTY formed in 1836 from Old Mexican Municipality; the county seat is Clarksville.

REFUGIO COUNTY formed in 1836 from Old Mexican Municipality; the county seat is Refugio.

SABINE COUNTY formed in 1836 from Old Mexican Municipality; the county seat is Hemphill.

SAN AUGUSTINE COUNTY formed in 1836 from Old Mexican Municipality; the county seat is San Augustine.

SAN PATRICIO COUNTY formed in 1836 from Old Mexican Municipality; the county seat is Sinton.

SHELBY COUNTY formed in 1836 from Old Mexican Municipality; the county seat is Center.

VICTORIA COUNTY formed in 1836 from Old Mexican Municipality; the county seat is Victoria.

WASHINGTON COUNTY formed in 1836 from Old Mexican Municipality; the county seat is Brenham.

1837

AUSTIN COUNTY formed in 1837 from Old Mexican Municipality; the county seat is Bellville.

COLORADO COUNTY formed in 1837 from Old Mexican Municipality; the county seat is Columbus.

FANNIN COUNTY formed in 1837 from Red River County; the county seat is Bonham.

FAYETTE COUNTY formed in 1837 from Bastrop, Colorado Counties; the county seat is La Grange.

FORT BEND COUNTY formed in 1837 from Austin County; the county seat is Richmond.

HOUSTON COUNTY formed in 1837 from Nacogdoches County; the county seat is Crockett.

MONTGOMERY COUNTY formed in 1837 from Washington County; the county seat is Conroe.

ROBERTSON COUNTY formed in 1837 from Milam County; the county seat is Franklin.

1838

GALVESTON COUNTY formed in 1838 from Brazoria County; the county seat is Galveston.

1839

HARRISON COUNTY formed in 1839 from Shelby County; the county seat is Marshall.

1840

BOWIE COUNTY formed in 1840 from Red River County; the county seat is New Boston.

LAMAR COUNTY formed in 1840 from Red River County; the county seat is Paris.

SUTTON COUNTY formed in 1840 from Crockett County; the county seat is Sonora.

TRAVIS COUNTY formed in 1840 from Bastrop County; the county seat is Austin.

1841

BRAZOS COUNTY formed in 1841 from Washington, Robertson Counties; the county seat is Bryan.

STERLING COUNTY formed in 1841 from Tom Green County; the county seat is Sterling City.

*1842

***NAVASOTA COUNTY 28 JAN - The Sixth Texas Congress changes the name of Navasota County to Brazos County.

1843

RUSK COUNTY formed in 1843 from Nacogdoches County; the county seat is Henderson.

1846

ANDERSON COUNTY formed in 1846 from Houston County; the county seat is Palestine.

ANGELINA COUNTY formed in 1846 from Nacogdoches County; the county seat is Lufkin.

BURLESON COUNTY formed in 1846 from Milam, Washington Counties; the county seat is Caldwell.

CALHOUN COUNTY formed in 1846 from Victoria, Matagorda, Jackson Counties; the county seat is Port Lavaca.

CASS COUNTY formed in 1846 from Bowie County; the county seat is Linden.

CHEROKEE COUNTY formed in 1846 from Nacogdoches County; the county seat is Rusk.

COLLIN COUNTY formed in 1846 from Fannin County; the county seat is McKinney.

COMAL COUNTY formed in 1846 from Bexar, Gonzales, Travis Counties; the county seat is New Braunfels.

DALLAS COUNTY formed in 1846 from Nacogdoches, Robertson Counties; the county seat is Dallas.

DENTON COUNTY formed in 1846 from Fannin County; the county seat is Denton.

De WITT COUNTY formed in 1846 from Goliad, Gonzales, Victoria Counties; the county seat is Cuero.

GRAYSON COUNTY formed in 1846 from Fannin County; the county seat is Sherman.

GRIMES COUNTY formed I 1846 from Montgomery County; the county seat is Anderson.

GUADALUPE COUNTY formed in 1846 from Bexar, Gonzales Counties; the county seat is Seguin.

HENDERSON COUNTY formed in 1846 from Houston, Nacogdoches Counties; the county seat is Athens.

HOPKINS COUNTY formed in 1846 from Lamar, Nacogdoches Counties; the county seat is Sulphur Springs.

HUNT COUNTY formed in 1846 from Fannin, Nacogdoches Counties; the county seat is Greenville.

LAVACA COUNTY formed in 1846 from Colorado, Victoria, Jackson, Gonzales Counties; the county seat is Hallettsville.

LEON COUNTY formed in 1846 from Robertson County; the county seat is Centerville.

LIMESTONE COUNTY formed in 1846 from Robertson County; the county seat is Groesbeck.

NAVARRO COUNTY formed in 1846 from Robertson County; the county seat is Corsicana.

NEWTON COUNTY formed in 1846 from Jasper County; the county seat is Newton.

NUECES COUNTY formed in 1846 from San Patricio County; the county seat is Corpus Christi.

PANOLA COUNTY formed in 1846 from Harrison, Shelby Counties; the county seat is Carthage.

POLK COUNTY formed in 1846 from Liberty County; the county seat is Livingston.

SMITH COUNTY formed in 1846 from Nacogdoches County; the county seat is Tyler.

TITUS COUNTY formed in 1846 from Red River, Bowie Counties; the county seat is Mount Pleasant.

TYLER COUNTY formed in 1846 from Liberty County; the county seat is Wodville.

UPSHUR COUNTY formed in 1846 from Harrison, Nacogdoches Counties; the county seat is Gilmer.

WALKER COUNTY formed in 1846 from Montgomery County; the county seat is Huntsville.

WHARTON COUNTY formed in 1846 from Matagorda, Jackson Counties; the county seat is Wharton.

1848

CALDWELL COUNTY formed in 1848 from Gonzales County; the county seat is Lockhart.

CAMERON COUNTY formed in 1848 from Nueces County; the county seat is Brownsville.

COOKE COUNTY formed in 1848 from Fannin County; the county seat is Gainesville.

GILLESPIE COUNTY formed in 1848 from Bexar County; the county seat is Fredericksburg.

HAYS COUNTY formed in 1848 from Travis County; the county seat is San Marcos.

KAUFMAN COUNTY formed in 1848 from Henderson County; the county seat is Kaufman.

MEDINA COUNTY formed in 1848 from Bexar County; the county seat is Hondo.

STARR COUNTY formed in 1848 from Nueces County; the county seat is Rio Grande City.

VAN ZANDT COUNTY formed in 1848 from Henderson County; the county seat is Canton.

WEBB COUNTY formed in 1848 from Bexar County; the county seat is Laredo.

WILLIAMSON COUNTY formed in 1848 from Milam County; the county seat is Georgetown.

1849

ELLIS COUNTY formed in 1849 from Navarro County; the county seat is Waxahachie.

TARRANT COUNTY formed in 1849 from Navarro County; the county seat is Fort Worth.