Zip Code 66604 — Topeka, KS
66604 is a ZIP Code associated with Topeka, KS, located within Shawnee. 66604 ranks #2 out of 24 ZIP codes in Shawnee County by population (and #35 out of 704 in KS). The area supports an estimated population of 23,006 residents across Data Pending housing units, with a population density of 1,314.2 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (39.038750, -95.726230)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 66604 |
| Primary City | Topeka |
| State / Province | KS |
| County | Shawnee |
| Total Population | 23,006 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 1,314.2 people/sq mi |
| Timezone | America/Chicago |
How 66604 Compares
| Metric | ZIP 66604 | Shawnee County | KS State Average |
|---|
| Population | 23,006 | 178,325 (Total) | 2,947,026 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 1,314.2 /sq mi | -- | -- |
| County Pop Rank | #2 of 24 | -- | -- |
Nearby ZIP Codes
Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →