Texas's 12th Senate district
District 12 of the Texas Senate is a senatorial district that currently serves all of Wise County, and portions of Dallas, Denton and Tarrant counties in the U.S. state of Texas.
The current senator from District 12 is Tan Parker.
Biggest cities in the district
District 12 has a population of 818,893 with 588,816 that is at voting age from the 2010 census.| Name | County | Pop. | |
| 1 | Fort Worth | Tarrant | 137,584 |
| 2 | Lewisville | Denton | 94,449 |
| 3 | Carrollton | Denton | 69,743 |
| 4 | Flower Mound | Denton/Tarrant | 64,669 |
| 5 | Frisco | Denton | 44,500 |