The Missouri Municipal League (MML) was organized in 1934. Since its organization, its aim has been "to develop an agency for the cooperation of Missouri cities, towns and villages and to promote the interest, welfare and closer relations among them in order to improve municipal government and administration in the state." Thus, the League's basic goal is to strengthen cities through unity and cooperation. Of particular importance is the legislative and policy advocacy services provided by MML, including promoting the interests of Missouri municipalities before the Missouri General Assembly, the U.S. Congress and state and federal agencies.

The MML is an independent, statewide, not-for-profit association governed by a Board of Directors consisting of a President, Vice President, Active Past Presidents, 12 elected municipal officials and five appointed municipal officials; with at least one Board member from each Congressional District. The Board appoints an Executive Director to manage the affairs of the League.

In 2017, the Independence City Council elected to cancel the City's membership in the MML and instead engaged two separate lobbying firms to represent the City's legislative and policy advocacy interests. In 2022, these services represented a combined expense of $240,000. 

The Fiscal Year 2022-23 Budget, adopted in June 2022, provided funding to reengage with the MML and terminate the lobbying services with the two firms. Notice has been provided to both firms of the termination of these agreements.