Winnebago County Prescription Drug Drop-off Site Oshkosh, WI Contact Information 420 Jackson St, Oshkosh, WI, Wisconsin 54901 (920) 232-3000 https://www.co.winnebago.wi.us/health... Location Get Directions By car By public transit Walking Bicycling HoursThis is a 24-hour drop-off site. Hazardous Medications 1 2 3 4 50.000 Does this listing contain inaccurate information? If so please send us a correction. Your name Your email Subject Please describe what corrections need to be made to the listing.