As of January 01, 2026, the average annual salary for Chemical Process Engineer in Illinois is $96,802, equivalent to $47 per hour, $1,862 weekly, or $8,067 monthly. These figures, sourced from Salary.com’s real-time job posting scans, highlight competitive earning potential for Chemical Process Engineer in cities like Santa Clara, San Jose, and Fremont.
Annually Salaries for Chemical Process Engineer in Illinois vary widely, spanning from $84,177 to $113,019. Most professionals fall between the 25th percentile ($90,194) and 75th percentile ($105,290), while top earners (90th percentile) make $113,019 per year. This $15,096 pay gap underscores opportunities for salary growth through certifications, specialized skills like Analysis or Design Engineering, or targeting high-paying regions like District of Columbia or California.
Location and experience significantly influence earnings. For example, Illinois Chemical Process Engineer often earn 1.9% higher than national averages due to demand from Fortune 68 companies. However, Illinois currently ranks 14 nationwide for Chemical Process Engineer job salary. Professionals are advised to focus on high-growth sectors like to offset market challenges.
