The average teacher salary at Castaic Union was $106,353 , which is 16 percent lower than the average salary for this job in California, but 63 percent higher than the national average for this job . Teacher salaries at Castaic Union typically range from $84,505 to $139,587 (25th to 75th percentile). The highest reported teacher salary was $162,672. There are 111 employees at Castaic Union with the job title teacher.