Why are egg prices in California different from the national price?

Egg prices in California differ from the national price because California is a separate market: every egg sold in the state has to come from a cage-free hen, USDA quotes the state's price delivered rather than at the plant, and California's own flocks have taken bird-flu losses on their own schedule. On USDA's daily index, California cage-free large white eggs are 53.0¢/doz delivered, while the national conventional benchmark is 39.5¢/doz at the plant.

The California numbers themselves, including the price retailers pay for cartons delivered to Southern California stores, are on California egg prices. This guide is about why they run apart from the national market.

1. California buys only cage-free eggs

Proposition 12, passed by voters in 2018, bans the sale in California of shell eggs and liquid eggs from hens confined in ways the law prohibits (California Health and Safety Code 25990). Since January 1, 2022 that has meant cage-free housing that meets the 2017 United Egg Producers cage-free guidelines, which the California Department of Food and Agriculture's rules put at 1 to 1.5 square feet of usable floor space per hen depending on the system. The ban applies wherever the eggs were produced; in the Legislative Analyst's Office's words, it covers "products from animals raised in California or out-of-state." It built on an earlier law, AB 1437 (2010), which from January 1, 2015 barred the sale in California of shell eggs from hens housed below the standards of 2008's Proposition 2.

That changes which national number is even relevant. Most headlines quote the conventional benchmark, the price of eggs from caged hens, and a caged hen's egg cannot legally be sold in California. California's reference is the cage-free price, so when the cage-free premium over conventional widens, California moves with it, and the gap to the conventional benchmark widens too. Why cage-free eggs cost more covers the production side.

2. The price is delivered, and much of the supply travels

USDA's California cage-free quote is a delivered price: it includes getting the eggs to the buyer. The national index is priced at the plant. So part of every gap between the two is freight, before anything else differs. And much of California's supply does travel. The Legislative Analyst's Office noted in 2018 that Californians buy "most of the eggs and pork they eat" from other states, and the current counts point the same way: California had about 11.5% of the US population in 2025 (Census Bureau estimate) but about 2.8% of the table-egg layers in the nation's large flocks in August 2026, 8.6 million of 304.2 million in flocks of 30,000 or more (USDA NASS, Chickens and Eggs). Every one of those out-of-state eggs has to meet Proposition 12 to be sold in California, so the state draws on the cage-free part of other states' flocks and pays to truck it in.

3. California's flocks have their own bird-flu history

Highly pathogenic avian influenza does not hit every state at once. Between November 12 and December 31, 2024, APHIS confirmed the disease in 11 commercial table-egg layer flocks in California, 9.3 million birds in seven weeks, per this site's HPAI tracker. Across 2024 California accounted for 10.1 million of the 38.4 million commercial table-egg layers lost nationwide, about a quarter of the total in one state. NASS counted 5.6 million table-egg layers in California's large flocks in August 2025 and 8.6 million in August 2026, so the state spent most of a year rebuilding. A loss that size tightens the state's own supply far more than it moves the national average.

What the gap has looked like

USDA's California and national cage-free series both run from early 2025, and the gap between them has never been a fixed amount.

Worked example. On September 22, 2026, California cage-free large white was 52.1 cents a dozen delivered, national cage-free was 38.1 cents and the conventional benchmark 35.0 cents, both at the plant. California sat 14.0 cents above national cage-free, 37% higher, and 17.1 cents above conventional, 49% higher. Monthly averages tell the longer story. In cents the widest gap came in March 2025, when California cage-free averaged $6.47 a dozen against $5.27 nationally, a 119.6-cent gap at the tail of the bird-flu spike. In percentage terms the widest full month was April 2026, when prices were near their lows: 40.1 cents against 26.7, a 13.4-cent gap but 50% higher. Across the 12 months to September 2026 the monthly gap ranged from 4.4 to 30.1 cents.

A gap that swings like that is the signature of a separate market rather than a fixed add-on. California's price moves with the national market, up in a bird-flu spike and down after it, but not in lockstep, because its supply, its buyers and its delivered basis are its own.

What California shoppers can look up

No government agency publishes a monthly average retail egg price for California. The Bureau of Labor Statistics publishes its average egg price for the US as a whole, which this site tracks on US retail egg prices, and no current California or West-region egg price. The closest official California figure is USDA's weekly store-door price in its California shell egg report: cartoned Grade AA cage-free large eggs delivered to Southern California stores, 100.5 cents a dozen in the week of September 14, 2026. That is a delivered wholesale price, before the store's own margin, and California egg prices carries it by size every week.