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.
Board Members include:
| Board Member | Position |
| Walt Franklin-Secretary | McMullen County ISD School Board Member |
| Bessie Guerrero | McMullen Tax Assessor/Collector, Non-Voting Member |
| Max Quintanilla | McMullen County Commissioner |
| James E. Teal-Chairperson | McMullen County Judge |
| Warren Wheeler | McMullen County ISD School Board Member |
| Karen Wheeler | McMullen County ISD School Board Member |