Southwest Iowa 6-man Conference

1956: Hopkins (MO), Coin, College Springs, New Market, and Clearfield leave. league disbands

1954: Hopkins (MO) joins. Shelby, Farragut, and Tabor leave. Membership decreases to 5.

1953: Randolph and Thurman leave. Membership decreases to 7.

1951: Clearfield and Shelby join. Membership increases to 9.

1950: New Market joins. Stanton and Malvern leave.

1950: earliest known lineup includes Farragut, Tabor, Randolph, Thurman, Coin, College Springs, Stanton, and Malvern. Membership is 8.