Project Engineer Co-op Salary in Seattle, WA.
Updated on: Jan 14, 2026
How much does a Project Engineer Co-op make in Seattle, WA?
The average Project Engineer Co-op in Seattle, WA makes $106,301,
51% above the national average Project Engineer Co-op salary of $70,281.
This pay is 21% greater than the combined average salaries of other metroes San Jose, CA, Phoenix, AZ, and Oakland, CA.
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Project Engineer Co-op Salary Average
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*Data is estimated and depends on the generous anonymous contributions of individuals