Town Hall Address 53 Oniontown Road Greenville, PA 16125 United States- Mercer County Website http://delawaretownshipmc.com/ Deed Registry (724) 662-3800 http://www.mercerassessor.com/ias-portal Monday - Friday 8:30 am - 4:30 pm 109 Courthouse Mercer, PA 16137 United States Tax Collector 724-475-4331 147 Oniontown Road Greenville, PA 16125 United States County Mercer