Little Big 7
  • (1927-1933) – 7 Members  – Sandusky, Fremont Ross, Oberlin, Tiffin Columbian, Bellevue, Norwalk, Willard
Little Big 5
  • (1934-1936) – 5 Members – Oberlin, Port Clinton, Bellevue, Norwalk, Willard
Little Big 4
  • (1937-1944) – 4 Members – Port Clinton, Bellevue, Norwalk, Willard
Northern Ohio League (NOL)
  • (1944-1953) – 8 Members – Bellevue, Norwalk, Shelby, Willard, Galion, Upper Sandusky, Bucyrus, Crestline
  • (1954-2001) – 8 Members – Bellevue, Norwalk, Shelby, Willard, Galion, Upper Sandusky, Bucyrus, Tiffin Columbian
  • (Fall 2002) – 7 Members – Bellevue, Norwalk, Shelby, Willard, Galion, Upper Sandusky, Tiffin Columbian
  • (2003-2010) – 8 Members – Bellevue, Norwalk, Shelby, Willard, Galion, Upper Sandusky, Tiffin Columbian, Fostoria
  • (2011-2012) – 6 Members – Bellevue, Norwalk, Shelby, Willard, Tiffin Columbian, Sandusky
  • (2013-2016) – 7 Members – Bellevue, Norwalk, Shelby, Willard, Tiffin Columbian, Sandusky, Ontario
Sandusky Bay Conference (SBC)
  • (2017 River Division) – 6 Members – Lakota, Tiffin Calvert, Sandusky SMCC, Fremont St Joe, Margaretta, Willard
  • (2018 River Division) – 8 Members – Lakota, Tiffin Calvert, Sandusky SMCC, Fremont St Joe, Margaretta, Willard, Danbury, Gibsonburg
  • (2019 Bay Division) – 6 Members – Edison, Huron, Oak Harbor, Port Clinton, Vermilion, Willard