Knox County, IL Average Home Price (2026)
The average home price in Knox County, Illinois is about $144,500 (the 2026 median across 14 ZIP codes, at ~$93/sq ft) — 27% more affordable than the Illinois median and 50% more affordable than the typical U.S. home.
How Knox County compares
Knox County is relatively affordable for housing nationally: its typical home costs $144,500 against $197,000 for Illinois and $289,000 for the U.S. Within the county, ZIP-level values run from about $98,000 to $365,000.
| Area | Typical value | $ / sq ft |
|---|---|---|
| Knox County | $144,500 | $93 |
| Illinois | $197,000 | $134 |
| United States | $289,000 | $193 |
Knox County home prices by ZIP code
The 14 most valuable ZIP codes in Knox County (of 14 with data):
| ZIP code | Typical value | $ / sq ft | vs county |
|---|---|---|---|
| 61436 Gilson | $365,000 | $192 | +153% |
| 61428 Dahinda | $354,000 | $210 | +145% |
| 61430 East Galesburg | $279,000 | $147 | +93% |
| 61439 Henderson | $201,000 | $106 | +39% |
| 61448 Knoxville | $163,000 | $127 | +13% |
| 61472 Rio | $154,000 | $81 | +7% |
| 61489 Williamsfield | $150,000 | $87 | +4% |
| 61488 Wataga | $139,000 | $92 | -4% |
| 61467 Oneida | $137,000 | $120 | -5% |
| 61572 Yates City | $134,000 | $93 | -7% |
| 61458 Maquon | $118,000 | $62 | -18% |
| 61414 Altona | $116,000 | $77 | -20% |
| 61401 Galesburg | $105,000 | $92 | -27% |
| 61410 Abingdon | $98,000 | $92 | -32% |
Home value appreciation in Knox County
Home prices in Knox County have risen about 50% over the last 10 years (≈4.2% a year) and +60.3% over 20 years, according to the FHFA house price index through 2025. The most recent year came in at +5.5% — still rising. A home worth $144,500 today was worth roughly $96,077 ten years ago.
See where that trend takes a specific home with the home appreciation calculator — statewide, Illinois is +64.6% over the same 10 years. Past appreciation is a track record, not a forecast; local prices can fall.
Calculators for Knox County
Run the numbers for Knox County with the local rates already filled in — change any input to test your own situation.
Salary needed to buy a home in Knox County
To buy the typical $144,500 home in Knox County with 20% down, you need a household income of roughly $39,000 a year (about $920 a month for the mortgage, taxes, and insurance). With 10% down the bar rises to about $47,000, because the loan is bigger and mortgage insurance kicks in.
| Down payment | Cash down | Monthly payment | Income needed |
|---|---|---|---|
| 5% (+PMI) | $7,200 | $1,140/mo | $49,000/yr |
| 10% (+PMI) | $14,500 | $1,090/mo | $47,000/yr |
| 20% | $28,900 | $920/mo | $39,000/yr |
Assumes a 30-year fixed mortgage at 6.5%, property tax at 1.1% and insurance at 0.45% of value per year, PMI of 0.75% on loans with less than 20% down, and the standard 28% housing-to-income rule. Your rate, taxes, and HOA will move these — run your own numbers in the mortgage calculator.
What your budget buys in Knox County
At about $93 per square foot, here is roughly how much home different budgets get you in Knox County:
| Budget | Approx. size | What that looks like locally |
|---|---|---|
| $150k | 1610 sq ft | around the typical home here |
| $200k | 2150 sq ft | above the median — larger homes or the pricier ZIPs |
| $250k | 2690 sq ft | above the median — larger homes or the pricier ZIPs |
| $300k | 3230 sq ft | above the median — larger homes or the pricier ZIPs |
Wondering where that budget goes further? The relocation calculator ranks hundreds of U.S. cities by what the same money buys — it opens filtered to Illinois.
Estimate a specific home in Knox County
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Knox County home prices: frequently asked
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Browse all Illinois cities and counties, or look up price per square foot by ZIP code nationwide.
Directional estimates from public market data (Realtor.com & Zillow research; FHFA house price index; Census ZIP-to-county relationships), not appraisals.