Brazoria County is on the Brazos River on the Texas coast. The Congress of Coahuila and Texas created Brazoria Municipality in 1832 out of the lower third of Austin Municipality. Brazoria Couny became one of Texas' original 23 counties in 1836. Its present boundaries and size of 1,441 square miles were set on March 24, 1846. The statute describing its boundaries has 376 words, which is the longest boundary description of all of Texas' 254 counties. Copyright © TexasCounties.net.