As of October 01, 2026, the average annual salary for Plastic Engineer in Illinois is $92,392, equivalent to $44 per hour, $1,777 weekly, or $7,699 monthly. These figures, sourced from Salary.com’s real-time job posting scans, highlight competitive earning potential for Plastic Engineer in cities like San Jose, Santa Clara, and San Francisco.
Annually Salaries for Plastic Engineer in Illinois vary widely, spanning from $80,787 to $107,837. Most professionals fall between the 25th percentile ($86,318) and 75th percentile ($100,477), while top earners (90th percentile) make $107,837 per year. This $14,159 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 Plastic Engineer often earn 1.9% higher than national averages due to demand from Fortune 57 companies. However, Illinois currently ranks 14 nationwide for Plastic Engineer job salary. Professionals are advised to focus on high-growth sectors like to offset market challenges.
