The 21st Texas Legislature met from January 8 to April 6, 1889, in regular session. All members of the House of Representatives and a portion of the members of the Senate were elected in the 1888 general election.
| Affiliation | Members | Note |
|---|---|---|
| Democratic Party | 90 | |
| Republican Party | 3 | |
| Independent | 1 | |
| Total | 94 |
Members of the Texas Senate for the Twenty-first Texas Legislature:
Members of the House of Representatives for the Twentieth Texas Legislature:
^ These are multimember or flotorial districts.
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