Plain

County ZIP codes · California · FIPS 06025

Imperial County, CA ZIP Codes

Imperial County, California has 20 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 17 residential and 3 for PO boxes or a single organization. 15 of the residential ones lie mainly in Imperial County and 2 mainly in a neighboring county; 2 cross the county line. Median household income ranges from $38,654 in 92274 (Thermal) to $90,709 in 92251 (Imperial) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Imperial County?

92004 · Borrego Springs: $74k92222 · Bard: –92227 · Brawley: $59k92231 · Calexico: $50k92233 · Calipatria: $54k92243 · El Centro: $55k92249 · Heber: $72k92250 · Holtville: $72k92251 · Imperial: $91k92257 · Niland: $23k92259 · Ocotillo: $44k92266 · Palo Verde: –92273 · Seeley: $62k92274 · Thermal: $39k92275 · Salton City: –92281 · Westmorland: $29k92283 · Winterhaven: $43k92266920049222792283922749225092251922579225992233922439227592231922499228192004 · Borrego Springs: $74k92222 · Bard: –92227 · Brawley: $59k92231 · Calexico: $50k92233 · Calipatria: $54k92243 · El Centro: $55k92249 · Heber: $72k92250 · Holtville: $72k92251 · Imperial: $91k92257 · Niland: $23k92259 · Ocotillo: $44k92266 · Palo Verde: –92273 · Seeley: $62k92274 · Thermal: $39k92275 · Salton City: –92281 · Westmorland: $29k92283 · Winterhaven: $43k9226692004922279228392274922509225192257922599223392243922759223192004 · Borrego Springs: $74k92222 · Bard: –92227 · Brawley: $59k92231 · Calexico: $50k92233 · Calipatria: $54k92243 · El Centro: $55k92249 · Heber: $72k92250 · Holtville: $72k92251 · Imperial: $91k92257 · Niland: $23k92259 · Ocotillo: $44k92266 · Palo Verde: –92273 · Seeley: $62k92274 · Thermal: $39k92275 · Salton City: –92281 · Westmorland: $29k92283 · Winterhaven: $43k9226692004922279228392274922509225192257922599223392243
The residential ZIP codes of Imperial 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 $49,742 and $59,362.

They carry 17 postal town names.

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

All 17 residential ZIP codes in Imperial County

15 ZIP codes lie mainly in Imperial County; 2 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Imperial County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
92243 El Centro 49,069 433 $55k $318k 100%
92231 Calexico 38,621 563 $50k $313k 100%
92227 Brawley 28,315 48 $59k $292k 100%
92251 Imperial 27,454 111 $91k $369k 100%
92250 Holtville 7,830 22 $72k $324k 100%
92249 Heber 7,312 368 $72k $336k 100%
92233 Calipatria 6,836 45 $54k $203k 100%
92257 Niland 2,158 8 $23k $102k 100%
92281 Westmorland 2,082 158 $29k $304k 100%
92283 Winterhaven 1,732 5 $43k $94k 100%
92275 Salton City 1,219 30 – $161k 100%
92273 Seeley 1,090 339 $62k $206k 100%
92259 Ocotillo 198 1 $44k $159k 100%
92266 Palo Verde 99 0 – – 100%
92222 Bard no residents 0 – – 100%

Partly in Imperial County

Residential ZIP codes mainly in another county that reach at least 1% into Imperial County, by their share here
In this county
92004 Borrego Springs 3,007 3 $74k $390k 42%
92274 Thermal 18,167 84 $39k $164k 34%

Download the 20 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?

2 ZIP codes of Imperial County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Imperial County and in the neighboring counties
ZIPIn ImperialElsewhere
9227434%Riverside County 66%
9200442%San Diego County 58%

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

PO Box and single-organization ZIP codes

ZIP codes in Imperial County without a residential area (GeoNames postal codes)
ZIPPostal name
92232Calexico
92244El Centro
92331Fontana

Source: GeoNames postal codes (CC BY 4.0).

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Imperial County's ZIP codes use 3 prefixes: 920, 922 and 923.

Three-digit prefixes of Imperial 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 Imperial County's
PrefixSectional centerHereAll codes
920 San Diego, CA (SCF 920) 1 64
922 Sn Bernardino, CA (SCF 923) 18 59
923 Sn Bernardino, CA (SCF 923) 1 74

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