The average psychologist salary at Kelso was $65,447 , which is 40 percent lower than the average salary for this job in Washington, and 29 percent lower than the national average for this job . Psychologist salaries at Kelso typically range from $59,677 to $66,852 (25th to 75th percentile). The highest reported psychologist salary was $76,071. There are 5 employees at Kelso with the job title psychologist.