As of May 01, 2026, the average annual salary for Plant Engineer in Illinois is $92,516, equivalent to $44 per hour, $1,779 weekly, or $7,710 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 Illinois vary widely, spanning from $78,050 to $105,954. Most professionals fall between the 25th percentile ($84,944) and 75th percentile ($99,550), while top earners (90th percentile) make $105,954 per year. This $14,606 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, Illinois Plant Engineer often earn 1.9% higher than national averages due to demand from Fortune 61 companies. However, Illinois currently ranks 14 nationwide for Plant Engineer job salary. Professionals are advised to focus on high-growth sectors like to offset market challenges.
