ZIP code · Topeka · Kansas · United States

ZIP code 66604 — Topeka

ZIP code 66604 serves Topeka, Kansas.

Postal code
66604
Single source Value from one source, not cross-checked.
City
Topeka
County
Shawnee FIPS 20177
State
Kansas
Country
United States
Coordinates
39.0405, -95.7178 — precision precise (locality)
View on OpenStreetMap
Population
22,876 (ZCTA, ACS 5-year)
Population density
3,384 / sq mi
Land area
6.8 sq mi (17.5 km²) (ZCTA, ACS 5-year)
Median household income
$59,690
Per-capita income
$32,971
Median age
38.2
Households
9,845
Housing units
10,820
Median home value
$126,600
Median gross rent
$1,032 / month
Congressional district
KS-2 (119th Congress)
USDA hardiness zone
6b (-5 to 0 °F)
Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
Time zone
America/Chicago (UTC−6 / UTC−5 DST)
Area code
785
Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.

Climate — monthly normals

Warmest month Jul (avg high 89°F), coldest Jan (avg low 19°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F404556677685898780695543
Avg low °F192333435564686657443223
Precip in0.91.32.23.95.35.04.24.43.52.92.01.5

NOAA 1991–2020 climate normals from the nearest station: TOPEKA - NWS (5.2 mi) · NOAA NCEI

Places in ZIP 66604

Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology

About this page

US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.

GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page