Washington County is a county in Texas. As of the 2010 census, the population was 33,718. Its county seat is Brenham, which is located on the Brazos River. The county was created in 1835 as a municipality of Mexico and organized as a county in 1837. is named for George Washington, the first president of the United States.
Washington-on-the-Brazos in the county is notable as the site of the signing of the Texas Declaration of Independence during the Convention of 1836. Reflecting the county's history as a destination of mid-19th-century German immigrants who came after the 1848 German revolutions, in the 2000 US Census more than one-third of residents identified as being of German ancestry.
In 2013, the syndicated television series, Texas Country Reporter, hosted by Bob Phillips, declared the highways between Brenham and Chappel Hill as the No. 2 site for the viewing of wildflowers within Texas. The first ranking went to the Lady Bird Johnson Wildflower Center in Austin.