Mercer County has extended the countywide assessment project by one year. New assessed values, based on current market conditions, will now take effect for the 2028 tax year rather than 2027.
No action is required from Mercer County property owners at this time.

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Posted May 27, 2026

Mercer County is in the process of updating its comprehensive plan to guide growth and development over the next 10-15 years. This initiative aims to address key priorities such as economic development, infrastructure improvements, environmental sustainability, and enhancing quality of life for residents.
Visit the Mercer County Comprehensive Plan Homepage

Celebrate America's 250th birthday by attending one of Pennsylvania's 108 fairs! To find a fair near you, view the 2026 PA Fair Guide.

Learn More at PA State Association of County Fairs

Celebrate America's 250th Birthday in Mercer County. Click Here to learn more about America250 and scheduled events!

Click Here to View 2026 Scheduled Events