PlainZIP

Diablo, CA

Single-footprint Census roll-up for Diablo, CA: 1 USPS ZIP, population 964. Open the primary ZIP for household income, housing tenure, and commute from ACS 2023 5-Year Estimates.

U.S. Census Bureau, SimpleMaps US ZIP Code Database, delivery-area ZIP coverage

ACS city ledger plate

Sheet DIABLO-CA · Diablo, CA 1 ZIPs · 964 pop · #219/25278 · Contra Costa County

INC-TOP · RANK-TOP · ABOVE-PEER · BOOK-ONE · OWN-HIGH · POP-VILLAGE · SPREAD-UNK · HOME-TOP

  • INC-TOP $207,500
  • RANK-TOP #219/25278
  • ABOVE-PEER over San Ramon
  • BOOK-ONE 1 ZIP
  • OWN-HIGH 100% owners
  • POP-VILLAGE 964
  • SPREAD-UNK Single-ZIP book
  • HOME-TOP $2,000,001

Nearest income peer: San Ramon, CA ( $7,712 income $)

Instrument codes from this city’s ACS household income, national rank, county-peer gap, ZIP book, owner tenure, population scale, intra-city income spread, and home-value band, not a moving recommendation.

Income neighbourhood around Diablo

Lowest/highest poles plus county-sharing cities nearest Diablo on average ZIP median household income. Full ladder: /cities.

median HH income

What this shows County-sharing peers only, not the full US city board. Open a near peer when the gap is small; open the poles when the mosaic is wide.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2026-08-25

National city placement

According to ACS 5-Year Estimates, Diablo, CA sits among US cities with a top-decile household income, on a village-scale population base, across a single-ZIP footprint.

Top 1%
household income vs 25,278 US cities
964
city population (Census)
1
USPS ZIP codes covered
$207,500
avg ZIP median income

Income percentile ranks this city's average ZIP median household income against 25,278 US cities with ACS income on at least one ZIP. Scale and ZIP-spread words come from Census population and USPS ZIP coverage.

High-income footprint on only 1 ZIP: the city page and the ZIP page nearly coincide. Headline income $207,500 and home value $2,000,000+ should be read as near-neighborhood numbers ; bachelor's attainment averages 79.8%.

Owner-occupancy here runs high (100.0%) - tenure is stable enough that the ZIP detail's owner share is the right next click, not a renter-heavy compare.

Within California, Calpine is the closest lower-income city and Dillon Beach the closest higher-income city by average ZIP household income. Their 1 and 1 ZIP footprints are the immediate statewide comparison set for Diablo.

Population concentration

One ZIP, 94528, is all of Diablo

There is no split to weigh here: 94528 holds every one of Diablo's 964 ACS residents. City-level and ZIP-level numbers on this site are the same number twice, check the ZIP page for the income/tenure/commute breakdown.

Census ZBP business roll-up

Mid-pack ZBP load on Diablo's one ZIP

Citywide ZBP: 22 establishments, 170 employees , annual payroll $13,196k (~23 establishments per 1,000 residents) across 1 of 1 ZIPs. Peak business ZIP 94528 (22 units) ; leading NAICS Real estate and rental and leasing (5) · also Professional, scientific, and technical services · Arts, entertainment, and recreation .

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ZIP Codes in Diablo, CA

These ZIP codes sit in Contra Costa County, which covers 43 ZIP codes in all; 1 of them fall in Diablo. See the Contra Costa County roll-up →

Diablo sits in the upper half of Contra Costa County on income: Concord, Antioch and Pittsburg report less, while Danville reports more. San Pablo marks the far end of that range at $86,034, 59% below Diablo.

ZIP Code Population Median income Establishments Density
94528 964 $207,500 22 159
How we build city roll-ups · Guide: reading ZIP code data · BLS wages

Diablo roll-ups here are for informational purposes only and do not constitute financial or relocation advice. ACS and Census ZBP figures are estimates; confirm the current table against Census before a money or move decision involving Diablo, .