Bucyrus left after the 2001-02 school year for the North Central Conference and was replaced by Fostoria during winter of the 2002-03 school year.
In February and March 2009, Upper Sandusky and Galion were accepted as the ninth and tenth members of the North Central Conference, beginning in fall 2011. Fostoria applied for membership in the Suburban Lakes League, but was initially turned down.
In June 2009, the member schools of the NOL voted to accept Sandusky into the league, with competition beginning in 2011.
On August 17, 2009, Fostoria voted to join the newly formed Northern Buckeye Conference in 2011 with Rossford, coming from the Northern Lakes League and Eastwood, Elmwood, Genoa, Lake, Otsego and Woodmore, all schools that are coming from the Suburban Lakes League.
After a proposal to merge with the Sandusky Bay Conference was turned down by SBC principals, the NOL sought out additional members for their league.
Vermilion was initially admitted as a future member in 2011, to join in all sports but football for 2012-13, and for football in 2013-14. However, at a board meeting on June 11, 2012, they decided to recommit to the West Shore Conference and not leave for the NOL in 2012.
Ontario was admitted as a member of the NOL for the 2013-14 school year.This happened a year before the North Central Conference will fold after 2013-14. Galion was also invited to re-join the league, but they ultimately decided to join the MOAC after citing concern over potential league trips to Vermilion, even though travel distances are greater to some MOAC schools.