As of January 01, 2026, the average annual salary for Science Engineer in Illinois is $115,920, equivalent to $56 per hour, $2,229 weekly, or $9,660 monthly. These figures, sourced from Salary.com’s real-time job posting scans, highlight competitive earning potential for Science Engineer in cities like Santa Clara, San Jose, and Fremont.
Annually Salaries for Science Engineer in Illinois vary widely, spanning from $99,032 to $134,769. Most professionals fall between the 25th percentile ($107,080) and 75th percentile ($125,786), while top earners (90th percentile) make $134,769 per year. This $18,706 pay gap underscores opportunities for salary growth through certifications, specialized skills like Analysis or Computer Vision, or targeting high-paying regions like District of Columbia or California.
Location and experience significantly influence earnings. For example, Illinois Science Engineer often earn 1.9% higher than national averages due to demand from Fortune 32 companies. However, Illinois currently ranks 14 nationwide for Science Engineer job salary. Professionals are advised to focus on high-growth sectors like to offset market challenges.
