| ZIP Codes: | 8 ZIP Codes (7 Standard, 0 PO Box, 1 Unique) [See All] |
| Area Code: | 785 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:12:11 PM |
| Population: | 120,748 [See All] |
| FIPS: | 20045 |
| CBSA: | Lawrence, KS |
| Land Area: | 440 sq mi |
| Water Area: | 19 sq mi |
| Coordinates: | 38.9316, -95.2592 |
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120,748 residents live across 8 ZIPs covering 440 sq mi, served by 4 distinct USPS-recognized cities.
Population moved from 113,516 to 120,748 from 2014 to 2024 — a +6.4% change. 5 ZIPs gained residents, 3 lost.
The county's wealthiest ZIP 66025 (Eudora, $114,868 median) and poorest ZIP 66045 (Lawrence, $13,750) are 11.4 miles apart — a 8.4× income gap across local geography.
Median home values vary 1.7× across this county — from $233,700 in 66046 (Lawrence) to $393,400 in 66049 (Lawrence).
Density varies 40× across the county — from 42 people/sq mi in 66050 (Lecompton) to 1,697 in 66045 (Lawrence).
Most of the decade's growth concentrated around Lawrence — top growth ZIPs averaged +11.1% over the past ten years ( 66049 , 66006 and 66047 ).
Educational attainment ranges from 30.1% bachelor's+ in 66050 (Lecompton) to 61.4% in 66049 (Lawrence) — the breadth of educational profiles across the area.
Within Kansas, this is the #5 most populous of 106 counties and ranks #35 for median household income with the #6 fastest decade growth .
Hosts 1 single-entity Unique ZIP: 66045University Of Kansas .
Weighted by population, the typical household earns about $73,627 across the county — reflecting what a typical resident sees, not a simple ZIP average.
53.2% of adults age 25+ hold a bachelor's degree or higher (38,402 of 72,152 reporting). The most-educated ZIPs cluster around Lawrence.
7 Standard delivery, 0 PO Box only, 1 single-entity Unique ZIPs serve this county.
2 ZIPs in this county where more than 60% of adults 25+ hold a bachelor's degree — typically college campuses, research enclaves, or tech corridors.
Median household income spans 8.4× between the wealthiest and poorest ZIPs — a sign of significant intra-county inequality.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 66049 | Lawrence | Standard | 32,015 | $90,147 | 49.4 | 19.1% |
| 66044 | Lawrence | Standard | 28,820 | $55,955 | 66.0 | 4.1% |
| 66047 | Lawrence | Standard | 20,473 | $65,392 | 62.2 | 4.5% |
| 66046 | Lawrence | Standard | 19,658 | $65,478 | 42.1 | -0.3% |
| 66025 | Eudora | Standard | 8,083 | $114,868 | 68.1 | 2.0% |
| 66006 | Baldwin City | Standard | 8,013 | $80,960 | 109.4 | 9.8% |
| 66045 | Lawrence | Unique | 1,925 | $13,750 | 1.1 | -21.3% |
| 66050 | Lecompton | Standard | 1,761 | $91,979 | 41.6 | -10.6% |