Plain

County ZIP codes · Colorado · FIPS 08065

Lake County, CO ZIP Codes

Lake County, Colorado has 3 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 2 residential and 1 for PO boxes or a single organization.

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Lake County?

80461 · Leadville: $96k81251 · Twin Lakes: $106k804618125180461 · Leadville: $96k81251 · Twin Lakes: $106k804618125180461 · Leadville: $96k81251 · Twin Lakes: $106k8046181251
The residential ZIP codes of Lake County (whole outlines, including the parts in neighboring counties), shaded by median household income in national fifths (ACS 2020-2024).<$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

All 2 residential ZIP codes in Lake County

Residential ZIP codes mainly in Lake County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
80461 Leadville 6,957 29 $96k $458k 100%
81251 Twin Lakes 423 3 $106k $673k 100%

Download the 3 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).

PO Box and single-organization ZIP codes

ZIP codes in Lake County without a residential area (GeoNames postal codes)
ZIPPostal name
80429Climax

Source: GeoNames postal codes (CC BY 4.0).

Which first three digits do Lake County's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Lake County's ZIP codes use 2 prefixes: 804 and 812.

Three-digit prefixes of Lake County's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Lake County's
PrefixSectional centerHereAll codes
804Denver, CO (SCF 800)263
812Colorado Springs, CO (SCF 808)132

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.