(Beaver, UT) — The average price for a gallon of gas in Utah is now over 4-dollars and 20-cents. That’s 22-cents higher than the national average. Triple-A says Beaver County has the highest average price at 4-dollars and 45-cents. The least expensive price for a gallon of self-serve regular is in Daggett County where it’s 3-97. The average price in Salt Lake County is 4-19.