[7] West Sioux of Hawarden left the conference in 1965, and rejoined for a short period in the 1970s.
Former Lakes Conference member and current independent Western Christian has applied twice, and denied each time as well.
[18] On 20 September 2022, George-Little Rock applied for membership to the War Eagle Conference.
[24] Maurice-Orange City claimed the 2A state championship in 1987–88 and again in 1988–89,[25] and won the 3A title in 2004–05 as MOC-Floyd Valley.
[40][41] The Comets competed in the 2A basketball final again in 2021, losing to Western Christian, a team also located in Hull, as a member of the Lakes Conference.
[55] Before sharing sports with Rock Valley, Boyden-Hull tied West Harrison for the 1970 Class B track championship.
Maurice-Orange City has won the state track championship three times, Sioux Center twice, George and Okoboji once each.
[56] Rock Valley has three state golf titles, all won as a member of the Siouxland Conference.