The average price for gasoline in Mercer County is $3.89 a gallon, which is above the national average of $3.80, but below the state average of $4.02.
The national average last week was $3.68 and $3.53 last month.
Statewide last week the average was $3.92 and last month $3.90.
The data is from AAA.
The least expensive gas is in Mississippi at $3.30 a gallon. California is the most expensive at $5.02.
