The average police officer salary at Napa was $292,513 , which is 31 percent higher than the average salary for this job in California, and 147 percent higher than the national average for this job . Police Officer salaries at Napa typically range from $267,903 to $337,069 (25th to 75th percentile). The highest reported police officer salary was $435,767. There are 49 employees at Napa with the job title police officer.