The Board of Directors of the McMullen County Appraisal District consists of five voting members and on non-voting member. The non-voting member is the current Tax Assessor/Collector for McMullen County.
2026-2027 Board Members include:
| Board Member | Position |
| Walt Franklin-Secretary | McMullen County ISD School Board Member |
| Bessie Guerrero | McMullen Tax Assessor/Collector, Non-Voting Member |
| James E. Teal-Chairperson | McMullen County Judge |
| Jill Atkinson | McMullen County Treasurer |
| Warren Wheeler | McMullen County ISD School Board Member |
| Chris Turner | McMullen County ISD School Board Member |