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County ZIP codes · California · FIPS 06033

Lake County, CA ZIP Codes

Lake County, California has 16 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 15 residential and 1 for PO boxes or a single organization. 14 of the residential ones lie mainly in Lake County and 1 mainly in a neighboring county; 1 cross the county line. Median household income ranges from $42,241 in 95422 (Clearlake) to $84,152 in 95467 (Hidden Valley Lake) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Lake County?

95422 · Clearlake: $42k95423 · Clearlake Oaks: $41k95426 · Cobb: $84k95435 · Finley: –95443 · Glenhaven: –95451 · Kelseyville: $63k95453 · Lakeport: $71k95457 · Lower Lake: $64k95458 · Lucerne: $58k95461 · Middletown: $79k95464 · Nice: $62k95467 · Hidden Valley Lake: $84k95469 · Potter Valley: $83k95485 · Upper Lake: $105k95493 · Witter Springs: $75k9546995423954579546195485954519545395458954229542695422 · Clearlake: $42k95423 · Clearlake Oaks: $41k95426 · Cobb: $84k95435 · Finley: –95443 · Glenhaven: –95451 · Kelseyville: $63k95453 · Lakeport: $71k95457 · Lower Lake: $64k95458 · Lucerne: $58k95461 · Middletown: $79k95464 · Nice: $62k95467 · Hidden Valley Lake: $84k95469 · Potter Valley: $83k95485 · Upper Lake: $105k95493 · Witter Springs: $75k9546995423954579546195485954519545395458954229542695422 · Clearlake: $42k95423 · Clearlake Oaks: $41k95426 · Cobb: $84k95443 · Glenhaven: –95451 · Kelseyville: $63k95453 · Lakeport: $71k95457 · Lower Lake: $64k95458 · Lucerne: $58k95461 · Middletown: $79k95464 · Nice: $62k95467 · Hidden Valley Lake: $84k95469 · Potter Valley: $83k95485 · Upper Lake: $105k95493 · Witter Springs: $75k95469954239545795461954859545195453954589542295426
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).

How different are its ZIP codes?

The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $57,674 and $71,419.

They carry 15 postal town names.

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

All 15 residential ZIP codes in Lake County

14 ZIP codes lie mainly in Lake County; 1 more reaches into it from a neighboring county and follows the first table.

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
95422 Clearlake 17,054 634 $42k $217k 100%
95451 Kelseyville 12,592 136 $63k $352k 100%
95453 Lakeport 11,741 135 $71k $403k 100%
95467 Hidden Valley Lake 5,778 785 $84k $393k 100%
95458 Lucerne 3,638 104 $58k $250k 100%
95423 Clearlake Oaks 3,513 29 $41k $294k 100%
95461 Middletown 3,422 28 $79k $387k 100%
95485 Upper Lake 3,242 37 $105k $370k 100%
95457 Lower Lake 3,122 21 $64k $489k 100%
95464 Nice 2,484 979 $62k $155k 100%
95426 Cobb 1,257 44 $84k $312k 100%
95493 Witter Springs 228 29 $75k $625k 100%
95443 Glenhaven 81 19 – – 100%
95435 Finley no residents 0 – – 100%

Partly in Lake County

Residential ZIP codes mainly in another county that reach at least 1% into Lake County, by their share here
In this county
95469 Potter Valley 1,315 7 $83k $529k 37%

Download the 16 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).

Which ZIP codes cross the county line?

1 ZIP code of Lake County extends into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Lake County and in the neighboring counties
ZIPIn LakeElsewhere
9546937%Mendocino County 63%

Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).

PO Box and single-organization ZIP codes

ZIP codes in Lake County without a residential area (GeoNames postal codes)
ZIPPostal name
95424Clearlake Park

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. Every ZIP code of Lake County starts with 954.

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
954 North Bay, CA (SCF 949) 16 77

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