Gas prices in the Keystone State have edged up by a little more than a dime –14 cents — over the last week. Prices for a gallon of gas range from a low of four-dollars-29-cents in Harrisburg and Lebanon to four-39 in Scranton-Wilkes-Barre-Hazelton market. Pennsylvania ranks first nationwide among all states for gas taxes. The gas tax in Pennsylvania is 59-cents a gallon.