The California Governor's Office, also known as the Office of the Governor, serves as the central executive authority and executive branch of the State of California, led by Governor Gavin Newsom. Established upon California's admission to the Union, the office is responsible for enforcing state laws, developing and implementing public policy, managing the state budget, appointing key officials, and overseeing the executive branch's numerous agencies and departments. It plays a critical role in addressing statewide challenges including economic development, public safety, environmental protection, healthcare, housing affordability, and social equity. The office coordinates with the state legislature, federal government, and local entities to advance California's progressive agenda, often leading on national issues like climate action, criminal justice reform, and immigrant rights.

Within the Governor's Office are several specialized cabinets and agencies that support its mission, including the Governor’s Office of Business and Economic Development (GO-Biz) which promotes tech policy and economic growth in areas like Silicon Valley, along with other key entities such as the California Business, Consumer Services and Housing Agency, the Governor’s Office of Emergency Services (Cal OES), and the Office of Planning and Research. These focus on fostering innovation, attracting investment, and mitigating risks from climate change and economic downturns.

Historically innovative, the Governor's Office has been at the forefront of landmark policies from marriage equality and gun safety to universal healthcare access and minimum wage increases. Under Newsom's administration since 2019, priorities include combating homelessness, building resilient infrastructure, and protecting civil rights amid national political tensions. Based in Sacramento, the office employs hundreds of staff and maintains a broad influence network through partnerships with business leaders, NGOs, and international bodies, ensuring California's position as a global economic and environmental leader.