The county seat is Mercer. Here is information on the Mercer County Historical Society. Location: 119 South Pitt Street, Mercer, PA 16137 Telephone: (724) 662-3490 Facilities: Local History Research Library, Museum Galleries, administrative office. Hours: Tuesday through Friday 10 AM to 4:30 PM, Saturday 10 AM to 3 PM. CLOSED Sundays, Mondays and Holidays. At 11:07 PM 9/29/99 -0500, you wrote: >Could someone who lives in the area please let me know what the county >seat of Mercer County is? And is there a library or historical >society there? If so, what is the address, phone number, hours of >operation, and days it is open? [snip]