Walnut Creek, CA Salary. Walnut Creek, CA average salary is $72,240, median salary is $68,801 with a salary range from $21,053 to $336,000. Walnut Creek, CA salaries are collected from government agencies and companies.Each salary is associated with a real job position.alnut Creek, CA salary is full-time annual starting salary. Intern, contractor and hourly pay scale vary from regular exempt employee. Compensation depends on work experience, job location, bonus, benefits and other factors.