The latest data from the American Automobile Association shows the US national average price for regular gasoline at $4.459 per gallon as of May 27, slightly lower than the May 26 national average of $4.491 per gallon. The modest day-over-day decline comes after fuel prices climbed sharply during the Memorial Day travel period, when AAA reported the highest holiday gas prices seen in four years. Price differences remain substantial nationwide. West Coast states and non-contiguous markets continue to post the highest fuel costs in the United States, while many Southern and Midwestern states remain below the national average.Gas price today in CaliforniaCalifornia continues to report the highest gasoline prices in the nation. As of May 27, statewide fuel averages are:Regular gasoline: $6.094 per gallonMid-grade: $6.327Premium: $6.515Diesel: $7.379California’s higher environmental standards, fuel taxes and refining constraints continue to contribute to elevated pump prices.Gas price today in TexasTexas remains among the cheapest large fuel markets in the country. Current statewide averages are:Regular gasoline: $3.962 per gallonMid-grade: $4.444Premium: $4.807Diesel: $4.976Texas benefits from extensive refining infrastructure and relatively lower fuel taxes compared to coastal states.Gas price today in FloridaFlorida drivers continue paying below the national average despite increased holiday travel activity. Current averages include:Regular gasoline: $4.269 per gallonMid-grade: $4.721Premium: $5.053Diesel: $5.309The state remains heavily impacted by seasonal tourism demand during late spring and early summer travel periods.Gas price today in New YorkNew York gasoline prices remain above the national average, according to AAA data for May 27:Regular gasoline: $4.584 per gallonMid-grade: $5.075Premium: $5.470Diesel: $5.912Higher transportation costs, taxes and regional supply pressures continue to influence fuel prices across the Northeast.Gas price today in WashingtonWashington remains one of the most expensive fuel markets in the continental United States. Current statewide averages are:Regular gasoline: $5.752 per gallonMid-grade: $6.016Premium: $6.253Diesel: $6.726The state continues to see elevated prices tied to environmental regulations, refinery costs and regional supply constraints.Gas price today in HawaiiHawaii remains among the nation’s costliest states for fuel because of transportation and import-related expenses. As of May 27:Regular gasoline: $5.655 per gallonMid-grade: $5.876Premium: $6.133Diesel: $7.113The islands consistently rank near the top nationally for both gasoline and diesel prices.Gas price today in OklahomaOklahoma continues to rank among America’s least expensive fuel markets. Current statewide averages are:Regular gasoline: $3.959 per gallonMid-grade: $4.360Premium: $4.664Diesel: $4.939Lower operating costs and proximity to refining hubs help keep fuel prices relatively affordable in the state.States with the highest gas pricesAAA data shows that the country’s highest regular gasoline prices remain concentrated on the West Coast and in geographically isolated states. The most expensive regular gasoline markets include:California: $6.094Washington: $5.752Hawaii: $5.655Oregon: $5.290Alaska: $5.255Nevada: $5.243These states also report some of the nation’s highest diesel costs, with California diesel averaging $7.379 per gallon.States with the lowest gas pricesSouthern and Midwestern states continue to offer the cheapest gasoline prices nationwide. Among the lowest regular gasoline averages are:Indiana: $3.858Mississippi: $3.950Georgia: $3.958Oklahoma: $3.959Texas: $3.962Louisiana: $3.978Lower state fuel taxes, closer refinery access and reduced transportation costs continue to help suppress prices in these regions.