Assemblyman Roger Niello represents the 5th district in the California State Assembly, the district includes the Sacramento County communities of Arden Arcade, Carmichael, the City of Citrus Heights, Fair Oaks, the City of Folsom, North Highlands, McClellan Park, Orangevale, Natomas, Sacramento and the Placer County community of Granite Bay.

Born in San Francisco, Assemblyman Niello has lived in Sacramento nearly all of his life. After graduating from Sacramento's Encina High School, Roger Niello attended the University of California at Berkeley for his undergraduate studies, then completed his graduate studies at the University of California at Los Angeles.

Roger worked as a Certified Public accountant until he joined his family’s business at Niello Auto Group in 1974 and spent the next 25 years running retail automobile dealerships with his family partners.

Roger was elected to the Sacramento County Board of Supervisors in a special election in February of 1999. He has served Sacramento County in numerous capacities, serving on the Boards of the Criminal Justice Cabinet, Sacramento Area Council of Governments (SACOG), Sacramento Metropolitan Air Quality Management District, the Sacramento Transportation Authority (2002 Chair), the Sacramento Cable Commission, the Sacramento Area Flood Control District (SAFCA), the Sacramento County Water Agency, the Sacramento County Sanitation District, the Sacramento County Regional Sanitation District, the Regional Transit Board, the Sacramento Library Authority (2003 Chair), the Folsom-Sacramento-El Dorado Transportation Corridor Joint Powers Authority, the Sacramento Solid Waste Authority and the Yolo-Sacramento Port Commission.

He has served as President of the Sacramento, Metropolitan Chamber of Commerce, and was a member of the Capital Area Political Action Committee. Prior to becoming an elected official, Roger was very active as a volunteer in the Sacramento community.

He and his wife Mary reside in Fair Oaks. They have five children: Matthew, Eric, Kevin, Lisa, and Patrick.