| Texas's 21st State Senate district | |||
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| Demographics | 22.6% White 4.1% Black 72.3% Hispanic 1.2% Asian | ||
| Population | 888,624 | ||
District 21 of the Texas Senate is a senatorial district that currently serves all of Bee, Caldwell, Duval, Jim Hogg, Karnes, La Salle, Live Oak, McMullen, San Patricio, Starr, Webb, Wilson, and Zapata and portions of Atascosa, Bexar, Guadalupe, Hays, and Travis counties in the U.S. state of Texas.
The current senator from District 21 is Judith Zaffirini.