Town Hall Address 406 Old Ash Road MercerĀ , PA 16137 United States- Mercer County Website http://www.springfield-mercer.org/ 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 724-748-6888 262 Old Mercer Road VolantĀ , PA 16156 United States County Mercer