The average firefighter salary at Napa was $267,517 , which is 38 percent higher than the average salary for this job in California, and 163 percent higher than the national average for this job . Firefighter salaries at Napa typically range from $254,278 to $277,769 (25th to 75th percentile). The highest reported firefighter salary was $318,540. There are 13 employees at Napa with the job title firefighter.