Catherine R Colgan » Directory Go back to directory. Catherine R Colgan Ashtabula County Prosecutor’s Office Work 25 West Jefferson Street Jefferson Ohio 44047 work Phone: 440-576-3662work Fax: 440-576-3600workfax Email: crcolgan@ashtabulacounty.usINTERNET Website: https://www.co.ashtabula.oh.us/147/Prosecutor Categories: Assistant Prosecutor Updated 5 months ago.