Mark Warner (born 1954) is a United States senator from Virginia
Mark Warner or Marc Warner may also refer to:
- Mark Warner (Canadian politician) (born 1964), Canadian politician and lawyer
- Mark Warner (film editor) (born 1954), film editor
- Mark Warner (guitarist), Nashville Tennessee session guitarist, songwriter and music producer
- Mark Warner (House), fictional recurring character from the American television series House
- Mark Warner, Australian guitarist, member of After the Fall
- Mark Warner Ltd, British holiday company
- Marc Warner, CEO and co-founder of tech company Faculty