Eliza Tibbets (born Eliza Maria Lovell; 1823–1898) was among early American settlers and founders of Riverside, California; she was an activist in Washington, DC for progressive social causes, including freedmen's rights and universal suffrage before going to the West Coast. A spiritualist, she led seances in Riverside. She became known for successfully growing the first two hybrid Washington navel orange trees in California.
Married twice, she had a relationship with Luther C. Tibbets, living with him in Virginia and moving with him from Washington, DC to California in the early 1870s. They married there and lived by agriculture. Her success with the trees contributed to adoption by farmers of this variety of orange tree and rapid expansion of the citrus industry and the historic cultural landscape of orange groves in California, United States.
Born in Cincinnati on August 5, 1823, Eliza Maria Lovell was the youngest child of Oliver and Clarissa Downes Lovell. Pioneers to early Ohio, the Lovells had migrated to Cincinnati from Boston in 1812, traveling by covered wagon, then by ark (river boat). The Lovell family became prominent in the frontier town. Eliza's father was elected to several positions; as a town councilman, city councilman, and President of the Fire Wardens' Association; he was called as a New Jerusalem minister, and selected as a trustee of the city water works, the Woodward School, and the Academy of Fine Arts.
Her maternal uncle "Commodore" John Downes was a well-known and highly decorated officer of the War with Tripoli and the War of 1812. He commanded the Mediterranean Squadron and later the Pacific Squadron. Downes’ ship USS Potomac became the first U.S. naval vessel to circumnavigate the globe.