Union County Human Services Share: Human ServicesEmployment ServiceSocial Service Union County Human Services Visit Website Request Info 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 Map About Public Human Service Agency What's Nearby? Distance: 5 10 15 20 25 50 mi.