One ZIP code with no neighborhood at all
92697 doesn't cover a street or a subdivision. It's the campus of the University of California, Irvine, and zip-codes.com's delivery-type classification tags it "Unique" rather than standard or PO Box: one recipient, not a residential route. That code is one of 13 that carry "Irvine, CA" as their USPS place name, per GeoNames; the rest split into 9 ordinary delivery routes and three PO Box-only codes, 92616, 92619, and 92623, and every single one of the 13 falls inside one county, Orange.
A fourteenth code, 92650, turns up as a fourth PO Box entry on zip-codes.com's Irvine city page. It doesn't carry "Irvine, CA" as its primary place name in the GeoNames dataset this table draws from, so it's left off the 13 below.
All 13 ZIP codes with "Irvine, CA" as the primary USPS place name (per GeoNames.org, checked 2026-08-22)
| ZIP |
|---|
| 92602 |
| 92603 |
| 92604 |
| 92606 |
| 92612 |
| 92614 |
| 92616 |
| 92617 |
| 92618 |
| 92619 |
| 92620 |
| 92623 |
| 92697 |
The land the university bought for a dollar
Irvine's 13 ZIP codes cover ground that was still a working cattle and citrus ranch, roughly 93,000 acres known as the Irvine Ranch, within living memory of people who once worked it. UC president Clark Kerr picked the site in 1959 from a list of candidate parcels architect William Pereira had scouted the year before. In September 1960 the Irvine Company transferred title on 1,000 acres to the university, and UC Irvine's own institutional history records that the company charged one dollar for it because a company charter barred donating property outright to a public entity, so a token sale satisfied the rule instead. President Lyndon B. Johnson dedicated the land in 1964, telling the assembled crowd: "California is not just talking about education. You are doing something about it." UC Irvine opened for classes on October 4, 1965, with 1,589 students.
The city around that campus hadn't been built yet. Pereira and Irvine Company planners drew up a master plan for a community of 50,000 people radiating outward from the university, and the first phases of five founding villages, Turtle Rock, University Park, Westpark, El Camino Real, and Walnut, were finished by 1970. Residents of those villages voted to incorporate on December 28, 1971, choosing a city substantially larger than Pereira's original blueprint called for, according to Wikipedia's account of that vote. By then the campus the city is named around had already been operating for six years.
What the campus ZIP code does to a population count
Because 92697 carries no residential route, it complicates any estimate of Irvine's population built purely from ZIP-level data. Summing the residents zip-codes.com counts across the city's other 12 codes comes to roughly 307,670, short of the 318,629 Wikipedia cites for the city overall as of mid-2025. A single-institution code like 92697 simply doesn't carry a population figure the way a standard route does, so a ZIP-by-ZIP tally will always undercount a city that has one.
The remaining 12 codes split into 9 standard routes, ordinary neighborhood delivery, and 3 PO Box codes: 92616, 92619, and 92623. None of the three is tied to one large recipient the way 92697 is; they simply separate box-only mail from street delivery within a given area.
The Irvine block that isn't on 949
949 has covered Southern Orange County, Irvine included, since splitting off from 714 on April 18, 1998, the same split this site's California area codes list tracks alongside the rest of the state's numbering history. Wikipedia's service-area note for 949 carves out one exception inside Irvine: a strip of the Northpark neighborhood, running from the north side of Culver Drive at Interstate 5 to Jamboree Road, that still dials on 714.
714 predates 949 by nearly half a century. It split off from California's original 213 in 1951, decades before Irvine existed as a city, and it later picked up an overlay, 657, on September 23, 2008. The area-code field on zip-codes.com's per-ZIP pages for Irvine reflects that same boundary blur: 11 of the city's 13 codes list 949 alongside 714, 657, or both, and only two, 92602 and 92604, show 949 by itself. See this site's rundown of how area codes actually work for why a numbering-plan boundary and a city's edge rarely line up exactly.