Address:
Best Western Premier Waterfront Hotel & Convention Center (Hotel Rooms Sold Out)
1 N. Main Street, Oshkosh, WI 54901
https://www.oshkoshwaterfronthotel.com/

Overflow Hotels:

Hilton Garden Inn, 1355 W 20th Ave, Oshkosh, WI 54902 (Sold Out)
phone: (920) 966-1300
$89/room/night (plus tax)  Use Group Code: DPC
 
Boarders Inn & Suites by Cobblestone, 1515 Planeview Dr, Oshkosh, WI 54904
phone: (920) 230-7400
$109 (single) / $119 (double) per room/night (plus tax)
 
Gruenhagen Conference Center, 208 Osceola St, Oshkosh, WI 54901
Phone: (920) 424-1106
$40/room/night (full service) / $45/room/night (plus)
NOTE: These are dormitory rooms with 2 twin beds & shared bathroom
https://gcc.uwosh.edu/home/lodging/rooms-and-rates/full-service/

Please mention Democratic Party of WI State Convention room block.