The following are links to websites that County Administrative Officers would find useful:
The California State Association of Counties — represent county government before the California Legislature, administrative agencies and the federal government.
Urban Counties Caucus
Formed in 1991, the UCC addresses the needs of the twelve largest California counties, representing more than three-fourths of the state population.
Regional Council of Rural Counties
The Regional Council of Rural Counties is dedicated to representing the collective unique interests of rural California counties.
CSAC Corporate Associates
The California State Association of Counties' list of corporate associates.