Union County Human Services Share: Human ServicesEmployment ServiceSocial Service Union County Human Services Visit Website 940 London Ave, Ste. 1800 Marysville, OH 43040 (937) 644-1010 (800) 248-2347 (937) 644-8700 (fax) https://www.unioncountyohio.gov/Human-Services-Home Hours: M-F - 9AM-4PM About About Public Human Service Agency