ICMA's anchor organization in Mexico provides a presence for professional management and service delivery in Mexico and other Latin American countries.

The State and Local Legal Center (SLLC) provides assistance to state and local governments in connection with Supreme Court litigation by drafting amicus briefs representing the state and local government perspective. SLLC is operated and maintained by a Staff Advisory Council, which is chaired by the National Conference of State Legislatures. ICMA and other Big 7 organizations review the briefs and provide signatory support. Since 1983 the SLLC has filed over 300 amicus briefs in the Supreme Court on behalf of the Big 7.

ICMA works with the national associations of local and state governments to identify issues of importance. Below are some examples of the results of these collaborative efforts.