The average custodial salary at Hardin Isd was $19,308 , which is 27 percent lower than the average salary for this job in Texas, and 41 percent lower than the national average for this job . Custodial salaries at Hardin Isd typically range from $18,179 to $19,240 (25th to 75th percentile). The highest reported custodial salary was $29,370. There are 19 employees at Hardin Isd with the job title custodial.