The Jefferson Township Fair, located in Mercer, PA is a small, volunteer run fair. The fair offers free general admission and parking. We take a lot of pride in being able to have volunteers work all week at our fair, if only due to the public’s continued support over the years. The fair is here for individuals, and families alike to come and enjoy some of the areas finest livestock, exhibits, and food – if you check out our food stands, you will know why everyone always talks about them!