OneOC, formerly Volunteer Center Orange County, is a nonprofit 501c3 organization committed to accelerating nonprofit success through volunteer, training, consulting and business services. Serving Orange County, California, OneOC provides support and solutions to more than 650 nonprofit organizations and community initiatives each year.

Building on a 52-year history of mobilizing volunteer action, the organization announced its new name on September 15, 2010 to signal the expansion of its integrated service offerings to help nonprofits become as effective and efficient about their mission as they are passionate. OneOC is affiliated with Points of Lights Institute and HandsOn Network, enabling participation in national community service initiatives and connection to a larger movement of change.