Gas Prices Today May 20, 2026: The national average for gas price rose to $4.555 on Wednesday (May 20, 2026) from $4.533 on Tuesday (May 19, 2026), according to the AAA Fuel Prices website, marking a day-over-day increase. Gas prices show notable differences, with our analysis centred exclusively on trends in the nation’s five most populous states: California, Texas, Florida, New York, and PennsylvaniFuel prices show clear contrasts across the five most populous states. California remains the most expensive while Texas anchors the lower end. Florida sits in the mid‑range with seasonal fluctuations, and both New York and Pennsylvania trend higher due to urban demand and distribution challenges, underscoring how geography and policy shape the national fuel landscape.Here are the gas price averages (per gallon) for the top 5 US states by population (Wednesday, May 20, 2026)GAS Price Today in CaliforniaIn California, the current price of regular fuel is $6.145, mid-grade $6.384, premium $6.572, and diesel $7.420, according to the AAA Fuel Prices website.Gas Price Today in TexasThe AAA Fuel Prices data says that in Texas, the current price of regular fuel is $4.038, mid-grade $4.506, premium $4.875, and diesel $5.018.GAS Price Today in FloridaIn Florida, regular fuel is priced at $4.521 per gallon, mid-grade at $4.946, premium at $5.281, and diesel at $5.443.GAS Price Today in New YorkIn New York, regular fuel is priced at $4.612 per gallon, mid-grade at $5.098, premium at $5.498, and diesel at $5.939.GAS Price Today in PennsylvaniaIn Pennsylvania, regular fuel is priced at $4.644 per gallon, mid-grade at $5.067, premium at $5.452, and diesel at $5.930.