| ZIP Codes: | 44 ZIP Codes (33 Standard, 9 PO Box, 2 Unique) [See All] |
| Area Code: | 913 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:12:12 PM |
| Population: | 624,331 [See All] |
| FIPS: | 20091 |
| CBSA: | Kansas City, MO-KS |
| Land Area: | 502 sq mi |
| Water Area: | 11 sq mi |
| Coordinates: | 38.9322, -94.7419 |
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624,331 residents live across 44 ZIPs covering 502 sq mi, served by 13 distinct USPS-recognized cities.
Population moved from 562,904 to 624,323 from 2014 to 2024 — a +10.9% change. 27 ZIPs gained residents, 5 lost.
The county's wealthiest ZIP 66221 (Overland Park, $190,000 median) and poorest ZIP 66202 (Mission, $75,129) are 12.8 miles apart — a 2.5× income gap across local geography.
Median home values vary 2.9× across this county — from $242,300 in 66021 (Edgerton) to $711,300 in 66221 (Overland Park).
Density varies 83× across the county — from 52 people/sq mi in 66021 (Edgerton) to 4,352 in 66212 (Overland Park).
Educational attainment ranges from 21.3% bachelor's+ in 66021 (Edgerton) to 78.0% in 66206 (Leawood) — the breadth of educational profiles across the area.
Within Kansas, this is the #1 most populous of 106 counties and ranks #1 for median household income with the #1 fastest decade growth .
On the national stage, Johnson County is ranks #91 for income .
Weighted by population, the typical household earns about $116,711 across the county — reflecting what a typical resident sees, not a simple ZIP average.
57.5% of adults age 25+ hold a bachelor's degree or higher (245,756 of 427,727 reporting). The most-educated ZIPs cluster around Leawood.
33 Standard delivery, 9 PO Box only, 2 single-entity Unique ZIPs serve this county.
16 ZIPs in this county where more than 60% of adults 25+ hold a bachelor's degree — typically college campuses, research enclaves, or tech corridors.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 66062 | Olathe | Standard | 78,841 | $117,585 | 39.0 | 3.1% |
| 66061 | Olathe | Standard | 67,967 | $110,176 | 67.7 | 15.4% |
| 66212 | Overland Park | Standard | 32,917 | $81,477 | 7.6 | -3.0% |
| 66213 | Overland Park | Standard | 30,539 | $117,706 | 7.8 | 6.8% |
| 66030 | Gardner | Standard | 26,328 | $97,822 | 45.4 | 18.3% |
| 66215 | Lenexa | Standard | 25,960 | $88,232 | 8.1 | 3.2% |
| 66221 | Overland Park | Standard | 25,550 | $190,000 | 15.1 | 60.2% |
| 66216 | Shawnee | Standard | 24,881 | $111,744 | 8.0 | -1.0% |
| 66223 | Overland Park | Standard | 24,747 | $114,855 | 6.3 | 11.1% |
| 66208 | Prairie Village | Standard | 21,576 | $124,000 | 6.8 | 0.9% |
| 66209 | Leawood | Standard | 20,413 | $143,393 | 6.4 | 6.6% |
| 66210 | Overland Park | Standard | 20,347 | $95,636 | 6.1 | 9.9% |
| 66203 | Shawnee | Standard | 19,441 | $75,869 | 6.2 | -1.4% |
| 66204 | Overland Park | Standard | 17,948 | $75,889 | 5.0 | -7.1% |
| 66202 | Mission | Standard | 17,408 | $75,129 | 5.3 | 7.5% |
| 66226 | Shawnee | Standard | 16,219 | $173,667 | 11.5 | 21.9% |
| 66207 | Overland Park | Standard | 15,739 | $125,153 | 4.5 | 20.4% |
| 66205 | Mission | Standard | 14,032 | $102,449 | 3.6 | 1.3% |
| 66219 | Lenexa | Standard | 13,519 | $94,124 | 8.5 | 22.6% |
| 66083 | Spring Hill | Standard | 13,011 | $116,791 | 64.8 | 42.8% |
| 66224 | Overland Park | Standard | 12,683 | $188,004 | 7.0 | 3.7% |
| 66214 | Overland Park | Standard | 12,351 | $83,435 | 3.9 | 6.4% |
| 66206 | Leawood | Standard | 12,153 | $174,394 | 4.0 | 20.5% |
| 66085 | Stilwell | Standard | 11,486 | $152,500 | 25.1 | 53.5% |
| 66227 | Lenexa | Standard | 9,595 | $139,883 | 13.2 | 101.1% |
| 66218 | Shawnee | Standard | 8,820 | $168,878 | 9.4 | 18.8% |
| 66220 | Lenexa | Standard | 8,535 | $177,206 | 7.1 | 18.9% |
| 66018 | De Soto | Standard | 6,584 | $105,357 | 26.8 | 10.7% |
| 66211 | Leawood | Standard | 5,791 | $106,486 | 4.5 | 25.6% |
| 66217 | Shawnee | Standard | 5,468 | $93,651 | 9.7 | -3.5% |
| 66021 | Edgerton | Standard | 2,819 | $88,125 | 53.8 | 35.7% |
| 66031 | New Century | Standard | 655 | — | 3.5 | 29.4% |
| 66251 | Overland Park | Standard | 8 | — | 0.0 | — |
| 66285 | Lenexa | PO Box | — | — | 0.0 | — |
| 66201 | Mission | PO Box | — | — | 0.0 | — |
| 66222 | Mission | PO Box | — | — | 0.0 | — |
| 66250 | Lenexa | Unique | — | — | 0.0 | — |
| 66282 | Overland Park | PO Box | — | — | 0.0 | — |
| 66283 | Overland Park | PO Box | — | — | 0.0 | — |
| 66063 | Olathe | PO Box | — | — | 0.0 | — |
| 66051 | Olathe | PO Box | — | — | 0.0 | — |
| 66225 | Overland Park | PO Box | — | — | 0.0 | — |
| 66286 | Shawnee | PO Box | — | — | 0.0 | — |
| 66276 | Lenexa | Unique | — | — | 0.0 | — |