The 7-C Conference is a former high school athletic conference with its membership concentrated in central Wisconsin. It existed from 1926 to 1962, and its members belonged to the Wisconsin Interscholastic Athletic Association.

The 7-C Conference was formed in 1926 as the Four-County Conference, named after the four counties where member schools were located (Adams, Marquette, Portage and Waushara). It was initially made up of eleven small schools located in central Wisconsin: Adams-Friendship, Almond, Coloma, Hancock, Montello, Oxford, Plainfield, Redgranite, Wautoma, Westfield and Wild Rose.^[1] In 1929, the Four-County Conference added Neshkoro and Princeton to bring membership to thirteen schools.^[2] Despite the expansion into Green Lake County, the league did not change its name. Green Lake and Omro joined the Little 4-C in 1931, and Winneconne became members of the conference in 1932. That same year, the conference's name was changed to the 6-C Conference, representing its expanded geographic footprint:^[3]

In 1934 the conference renamed itself the 7-C Conference because of the expansion into Wood County, adding Markesan to the Little 7-C^[4] and Port Edwards (formerly of the Wood County League) to the Big 7-C.^[5] The next year, the league realigned itself by geography instead of enrollment size:

In 1937, several schools swapped divisions with Omro and Redgrantie joining the Eastern 7-C, Neshkoro and Wild Rose becoming members of the Northern 7-C and Plainfield shifted to the Western 7-C:

Endeavor joined the 7-C Conference in 1938 as its eighteenth overall member, and was assigned to the Northern 7-C. In 1940, Wild Rose moved back to the Eastern 7-C, giving each division six members:

1943 brought several changes to the divisional alignment of the 7-C Conference. Montello dropped its athletic program for the 1943-44 school year, and Almond and Hancock shifted from the Northern 7-C to serve as their replacements in the Western 7-C. When Montello resumed athletic competition in 1944, Hancock returned to the Northern 7-C. The next year, Markesan joined the Dual County Conference, and the 7-C Conference returned to realignment by size in two divisions:

After the end of World War II, the 7-C Conference began to lose members to school district conslidation. Coloma was the first to leave the conference for this reason, with their district folded into Westfield in 1946. Wild Rose shifted over from the Big 7-C to take their place. The next year, Hancock High School burned down and its students were redistricted to Plainfield, which named itself Tri-County High School soon thereafter. Almond moved over from the Big 7-C as their replacement. In 1948, the 7-C Conference lost two high schools to consolidation: Neshkoro (redistricted to Westfield) and Redgranite (redistricted to Wautoma). Endeavor High School closed its doors in 1951, with students being moved to other school districts in the area. With the Little 7-C down to only four members, Green Lake joined from the Big 7-C as a fifth member school. Membership further dwindled to eleven schools in 1954 when Princeton was accepted into the Dual County Conference. Omro left to join the Little Nine Conference in 1956, with Necedah (late of the Juneau County League) replacing them:

In 1959, the four of the five schools in the Little 7-C (Almond, Necedah, Oxford and Wild Rose) joined with Port Edwards of the Big 7-C to form the new Central Lakes Conference. Green Lake also exited the conference that year for membership in the Fox Valley Tri-County League, and membership dwindled to five schools. That number was decreased to four in 1961 when Montello left for the Dual County Conference. The 7-C Conference ceased operations in 1962. Three of its former members (Adams-Friendship, Tri-County and Westfield) aligned with the five Central Lakes Conference schools and Madonna High School in Mauston to form the new Central-C Conference. The fourth school (Wautoma) joined the Central Wisconsin Conference in the aftermath of the 7-C Conference's demise.

 Big 4-C/6-C/7-C  Little 4-C/6-C/7-C  Eastern 7-C  Northern 7-C  Western 7-C