Harris Newmark (July 5, 1834 – 1916) was a Jewish American businessman, philanthropist, and historian who was born in the West Prussian city of Löbau (now Lubawa, Poland). Newmark immigrated to the United States in 1853. He sailed from Europe to New York City, and then to San Francisco. He joined his older brother and other family in Los Angeles. His branch of the family were among the founders and developers of the region, founding Montebello, California and the related area.