| ZIP Codes: | 32 ZIP Codes (25 Standard, 2 PO Box, 5 Unique) [See All] |
| Area Codes: | 309 / 815 / 861 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:12:02 PM |
| Population: | 173,337 [See All] |
| FIPS: | 17113 |
| CBSA: | Bloomington, IL |
| Land Area: | 1,279 sq mi |
| Water Area: | 4 sq mi |
| Coordinates: | 40.4993, -88.8712 |
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173,337 residents live across 32 ZIPs covering 1,279 sq mi, served by 24 distinct USPS-recognized cities.
Population moved from 173,208 to 173,337 from 2014 to 2024 — a +0.1% change. 10 ZIPs gained residents, 15 lost.
The county's wealthiest ZIP 61748 (Hudson, $128,036 median) and poorest ZIP 61701 (Bloomington, $57,130) are 9.5 miles apart — a 2.2× income gap across local geography.
Median home values vary 3.0× across this county — from $110,900 in 61770 (Saybrook) to $328,200 in 61705 (Bloomington).
Density varies 206× across the county — from 16 people/sq mi in 61754 (Mc Lean) to 3,199 in 61701 (Bloomington).
Educational attainment ranges from 30.6% bachelor's+ in 61732 (Danvers) to 57.5% in 61705 (Bloomington) — the breadth of educational profiles across the area.
Within Illinois, this is the #13 most populous of 102 counties and ranks #9 for median household income .
Hosts 4 single-entity Unique ZIPs: 617103 State Farm Plaza ; 61709State Farm Ins Il Region Ofc ; 617913 State Farm Plaza ; and 61799Internal Revenue Service .
Weighted by population, the typical household earns about $80,776 across the county — reflecting what a typical resident sees, not a simple ZIP average.
47.3% of adults age 25+ hold a bachelor's degree or higher (50,747 of 107,397 reporting). The most-educated ZIPs cluster around Bloomington.
25 Standard delivery, 2 PO Box only, 5 single-entity Unique ZIPs serve this county.
5 ZIP codes in this county serve a single facility — typically theme parks, universities, large corporations, airports, or government complexes.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 61761 | Normal | Standard | 54,075 | $65,275 | 41.7 | -0.7% |
| 61704 | Bloomington | Standard | 37,279 | $95,027 | 18.8 | 1.3% |
| 61701 | Bloomington | Standard | 35,136 | $57,130 | 11.0 | -1.1% |
| 61705 | Bloomington | Standard | 13,213 | $120,547 | 82.1 | -0.3% |
| 61745 | Heyworth | Standard | 4,542 | $107,835 | 73.4 | 6.7% |
| 61752 | Le Roy | Standard | 4,332 | $87,591 | 92.2 | -1.3% |
| 61753 | Lexington | Standard | 2,833 | $104,119 | 79.9 | -7.9% |
| 61748 | Hudson | Standard | 2,675 | $128,036 | 47.3 | -3.6% |
| 61736 | Downs | Standard | 2,673 | $110,444 | 33.9 | 46.5% |
| 61726 | Chenoa | Standard | 2,546 | $77,800 | 99.9 | 3.7% |
| 61744 | Gridley | Standard | 2,157 | $68,000 | 75.9 | 15.8% |
| 61732 | Danvers | Standard | 2,099 | $107,941 | 64.2 | 3.0% |
| 61725 | Carlock | Standard | 1,459 | $126,083 | 43.4 | -0.8% |
| 61728 | Colfax | Standard | 1,359 | $97,159 | 70.7 | -4.2% |
| 61776 | Towanda | Standard | 1,285 | $119,625 | 43.6 | -18.8% |
| 61754 | Mc Lean | Standard | 1,131 | $98,681 | 72.9 | -4.2% |
| 61770 | Saybrook | Standard | 1,067 | $60,750 | 59.8 | 7.3% |
| 61774 | Stanford | Standard | 949 | $86,250 | 40.5 | 9.0% |
| 61722 | Arrowsmith | Standard | 658 | $111,042 | 44.1 | 31.3% |
| 61737 | Ellsworth | Standard | 416 | $83,750 | 35.0 | -43.0% |
| 61720 | Anchor | Standard | 374 | $91,250 | 27.6 | 108.9% |
| 61724 | Bellflower | Standard | 369 | $81,250 | 36.4 | -30.6% |
| 61730 | Cooksville | Standard | 361 | $76,719 | 31.7 | -10.6% |
| 61772 | Shirley | Standard | 273 | — | 30.0 | -26.4% |
| 61731 | Cropsey | Standard | 76 | — | 23.2 | -71.7% |
| 61791 | Bloomington | Unique | — | — | 0.0 | — |
| 61710 | Bloomington | Unique | — | — | 0.1 | — |
| 61709 | Bloomington | Unique | — | — | 0.1 | — |
| 61799 | Bloomington | Unique | — | — | 0.0 | — |
| 61702 | Bloomington | PO Box | — | — | 0.0 | — |
| 61758 | Merna | PO Box | — | — | 0.0 | — |
| 61790 | Normal | Unique | — | — | 0.0 | — |