As of February 01, 2026, the average annual salary for GIS Developer in Illinois is $66,836, equivalent to $32 per hour, $1,285 weekly, or $5,570 monthly. These figures, sourced from Salary.com’s real-time job posting scans, highlight competitive earning potential for GIS Developer in cities like Santa Clara, San Jose, and Fremont.
Annually Salaries for GIS Developer in Illinois vary widely, spanning from $55,794 to $80,237. Most professionals fall between the 25th percentile ($61,056) and 75th percentile ($73,851), while top earners (90th percentile) make $80,237 per year. This $12,795 pay gap underscores opportunities for salary growth through certifications, specialized skills like Analysis or CAD, or targeting high-paying regions like District of Columbia or California.
Location and experience significantly influence earnings. For example, Illinois GIS Developer often earn 1.9% higher than national averages due to demand from Fortune 68 companies. However, Illinois currently ranks 14 nationwide for GIS Developer job salary. Professionals are advised to focus on high-growth sectors like to offset market challenges.
