Texas House District 45 includes communities in Hays and Blanco Counties.
Democrat Erin Zwiener flipped the seat in an open race in 2018 by 3.2 percentage points.
In 2020, Zwiener is won reelection over Republican Carrie Isaac by 1.08 percentage points.
| Erin Zwiener (D) | Carrie Isaac (R) | |
| Totals | ||
| Total Money Raised | $1,421,367 | $1,592,262 |
| Total Number of Donations | 8,037 | 1,230 |
| Average Donation Amount | $176.85 | $1,294.52 |
| In-District | ||
| Total Money Raised In-District | $172,354 | $152,259 |
| Total Number of Donations From In-District | 1,863 | 688 |
| Percentage Raised From In-District | 12% | 10% |
| Out-Of-District | ||
| Total Money Raised Outside District | $1,249,013 | $1,440,003 |
| Total Number of Donations Raised Outside District | 6,174 | 542 |
| Percentage Raised From Outside District | 88% | 90% |
| Expenditures | ||
| Total Expenditures | $695,336 | $525,714 |
| Total Votes (November 3 General Election) | 57,111 | 55,900 |
| Cost Per Vote | $12.18 | $9.40 |
| Cash-On-Hand | ||
| Cash-On-Hand | $197,397 | $76,081 |
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