District 18 of the Texas Senate is a senatorial district that currently serves all of Aransas, Austin, Burleson, Calhoun, DeWitt, Fayette, Goliad, Gonzales, Grimes, Lavaca, Lee, Refugio, Victoria, and Washington counties, and portions of Fort Bend, Harris, Montgomery, Waller counties in the U.S. state of Texas.

[1] The current senator from District 18 is Lois Kolkhorst.

District 18 has a population of 809,726 with 587,890 that is at voting age from the 2010 census.

[2] Election history of District 18 from 1992.

[b]