Cooperative Extension plays a unique role by bringing the University of Arizona to both urban and rural Maricopa County. Maricopa County is home to almost four million people, each with unique needs. Extension provides practical information and education to help people make their lives better. Outreach efforts translate relevant University of Arizona research into effective practices people can put to immediate use in their homes and businesses.

Programs are conducted by The University of Arizona College of Agriculture and Life Sciences (CALS) Cooperative Extension faculty based just west of I-10 on Broadway Road in Maricopa County and by campus-based extension specialists. Faculty members – Extension agents – form partnerships with community groups and with trained volunteers to "bring the university to the people". Branch offices for master gardener volunteers are located throughout the county.