Illinois Extension & Soil Testing Directory
Find your local Illinois County Cooperative Extension office, official state university soil analysis lab, and Master Gardener volunteer plant clinics.
🔬 State Soil Testing Laboratory
Official Lab: U of I Extension Recommended Certified Soil Testing Labs
Standard Fee: $15 - $25 routine soil analysis
Turnaround Time: 5 to 7 business days
State residents can obtain soil sample bags and submittal forms at any local county extension branch.
🌱 State Growing Conditions
Soil Types: Rich Prairie Mollisols & Silt Loam
Hardiness Zones: Zone 5a / 7a
Popular Crops: Sweet corn, pumpkins, tomatoes, soybeans, tall fescue
Illinois prairie soils are high in organic matter; test regularly for nitrogen and phosphorus balance.
Featured County Directories in Illinois (10 Listings)
Cook County
Extension Office: University of Illinois Urbana-Champaign Extension - Cook County
Soil Lab Fee: $15 - $25 routine soil analysis
Phone: (170) 555-0199
DuPage County
Extension Office: University of Illinois Urbana-Champaign Extension - DuPage County
Soil Lab Fee: $15 - $25 routine soil analysis
Phone: (170) 555-0199
Lake County
Extension Office: University of Illinois Urbana-Champaign Extension - Lake County
Soil Lab Fee: $15 - $25 routine soil analysis
Phone: (170) 555-0199
Will County
Extension Office: University of Illinois Urbana-Champaign Extension - Will County
Soil Lab Fee: $15 - $25 routine soil analysis
Phone: (171) 555-0199
Kane County
Extension Office: University of Illinois Urbana-Champaign Extension - Kane County
Soil Lab Fee: $15 - $25 routine soil analysis
Phone: (170) 555-0199
McHenry County
Extension Office: University of Illinois Urbana-Champaign Extension - McHenry County
Soil Lab Fee: $15 - $25 routine soil analysis
Phone: (171) 555-0199
Winnebago County
Extension Office: University of Illinois Urbana-Champaign Extension - Winnebago County
Soil Lab Fee: $15 - $25 routine soil analysis
Phone: (172) 555-0199
Champaign County
Extension Office: University of Illinois Urbana-Champaign Extension - Champaign County
Soil Lab Fee: $15 - $25 routine soil analysis
Phone: (170) 555-0199
Sangamon County
Extension Office: University of Illinois Urbana-Champaign Extension - Sangamon County
Soil Lab Fee: $15 - $25 routine soil analysis
Phone: (171) 555-0199
Peoria County
Extension Office: University of Illinois Urbana-Champaign Extension - Peoria County
Soil Lab Fee: $15 - $25 routine soil analysis
Phone: (171) 555-0199
📦 Recommended Mail-In Soil Test Kits & Meters
FTC Affiliate Disclosure: We may earn a commissionIf you need immediate results without waiting for university mail-in lab turnaround times, these top-rated professional home soil test kits provide fast pH, N, P, and K diagnostic analysis:
MySoil Soil Test Kit
Professional mail-in kit analyzed by accredited labs. Returns 13 essential nutrient values (N, P, K, pH, Micronutrients) & customized fertilizer recommendations via app.
Luster Leaf Rapitest 1601
Popular color-comparator kit for 10 instant soil tests (pH, Nitrogen, Phosphorus, Potash). Includes tailored plant preference chart.
Sonkir 3-in-1 Soil Tester
Instant probe sensor for soil moisture, pH, and sunlight levels. Requires no batteries. Perfect for potted plants, lawns, and raised beds.
📋 Request Local Extension & Lawn Testing Assistance in Illinois Statewide
Need help interpreting your lab results or finding local agricultural extension agents? Fill out the brief form below:
Frequently Asked Questions: Illinois Soil & Extension
How do I get my soil tested in Illinois?
To test your soil in Illinois, collect 10 to 12 soil cores from a depth of 4 to 6 inches across your garden or field, air-dry the sample indoors, fill out your county extension submission form, and submit it to U of I Extension Recommended Certified Soil Testing Labs or your local county extension office.
How much does soil testing cost in Illinois?
Routine soil fertility analysis in Illinois typically costs $15 - $25 routine soil analysis. Turnaround time for results is usually 5 to 7 business days.
Does every county in Illinois have a Cooperative Extension Office?
Yes. Every county in Illinois is served by the state's Land-Grant University Extension system. While our directory highlights primary regional office hubs and university labs, local extension agents serve horticulturists, farmers, and home gardeners across all counties in Illinois.
Written & Verified by Sahajul
Verified Author & Founder
Sahajul is an independent agricultural data researcher based in India and founder of LocalSoilLab.com. He specializes in compiling, structuring, and verifying US land-grant university extension services, soil lab testing fee schedules, and county Master Gardener contact directories directly from official .edu and USDA NIFA portals.