As of July 01, 2026, the average annual salary for Plant Engineer in Seattle, WA is $100,334, equivalent to $48 per hour, $1,930 weekly, or $8,361 monthly. These figures, sourced from Salary.com’s real-time job posting scans, highlight competitive earning potential for Plant Engineer in cities like San Jose, Santa Clara, and San Francisco.
Annually Salaries for Plant Engineer in Seattle, WA vary widely, spanning from $84,628 to $114,907. Most professionals fall between the 25th percentile ($92,113) and 75th percentile ($107,962), while top earners (90th percentile) make $114,907 per year. This $15,849 pay gap underscores opportunities for salary growth through certifications, specialized skills like Standard Operating Procedures or Continuous Improvement, or targeting high-paying regions like District of Columbia or California.
Location and experience significantly influence earnings. For example, Seattle Plant Engineer often earn 1.9% higher than national averages. However, Seattle currently ranks 67 statewide for Plant Engineer job salary. Professionals are advised to focus on high-growth sectors like to offset market challenges.
