The average cook salary at Delta County was $34,528 , which is 56 percent higher than the average salary for this job in Colorado, but 9 percent lower than the national average for this job . Cook salaries at Delta County typically range from $30,519 to $38,536 (25th to 75th percentile). The highest reported cook salary was $38,535. There are 3 employees at Delta County with the job title cook.