Belia, who lives in American Canyon, was born in Napa and raised in unincorporated St. Helena and Pope Valley. She calls all of Napa County home. Belia is a business owner, educator, and mother of three children. Belia attended St. Helena public schools from kindergarten through high school. She graduated from Saint Mary’s College of California in 1999 and UC Hastings College of the Law in 2004.

Prior to serving on the Board of Supervisors, Belia served as an American Canyon City Council Member from 2010-2016. In 2017, Belia began serving on the Board of Supervisors. In April 2017, she became Board Chair, and currently serves on the following panels: 25th District Agricultural Association, Napa Valley Transportation Authority, Association of Bay Area Governments, North Bay Water Reuse Authority, Latino Caucus of California Counties and Rebuild North Bay.