The average teacher salary at Mexia Isd was $46,118 , which is 28 percent lower than the average salary for this job in Texas, and 29 percent lower than the national average for this job . Teacher salaries at Mexia Isd typically range from $40,249 to $51,081 (25th to 75th percentile). The highest reported teacher salary was $77,381. There are 149 employees at Mexia Isd with the job title teacher.