The Mercer County Engineer's Office is responsible for maintaining and improving the 384.129 miles of County roadways and the 400 Bridges on the Mercer County local roads. The County Engineer is the Engineer for the Township Trustees in all of the Mercer County Townships and the Engineer works closely with the Townships on Township roadway maintenance and improvement.

We are a multi-faceted engineering agency covering all phases of local road and transportation development. Some of the more significant areas of our efforts consist of Survey and Design, Road Maintenance and Reconstruction, Bridge and Culvert Construction, Drainage Improvements and Snow Removal.

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5 Year Capital Improvement Program-Bridges & Culverts

5 Year Capital Improvement Program-Paving

Township Trustee & Zoning Inspector Listing


The Engineer's Office, 4884 Mud Pike, is between Fleetfoot Road and Hellwarth Road. The Phone Number is 419-586-7759 and the Fax Number is 419-586-9887.


  • Monday thru Friday: 7:30 AM to 4:00 PM
Note: During the construction season (Apr.-Sept.) the operations employees work a 4-ten hour day schedule from 6:30 AM to 5:00 PM (Mon.-Thurs.)


  • Blackcreek
  • Butler
  • Center
  • Dublin
  • Franklin
  • Gibson
  • Granville
  • Hopewell
  • Jefferson
  • Liberty
  • Marion
  • Recovery
  • Union
  • Washington


Closing Date Day of the Week Holiday
January 1 Thursday New Year's Day
January 19 Monday MartinLuther King Day
February 16 Monday Presidents' Day
May 25 Monday Memorial Day
July 3 Friday Independence Day
September 7 Monday Labor Day
October 12 Monday Columbus Day
November 11 Wenesday Veterans Day
November 26 Thursday Thanksgiving Day
November 27 Friday Thanksgiving Holiday
December 25 Friday Christmas