Fannie Eliza Ostrander (1859 – 1921) was an American writer. Born in North Haven, Connecticut, Ostrander was a graduate of the Wisconsin State Normal School; she also had private instruction. She taught school for four and a half years, and became a critic, editor, and writer for a publishing house in Chicago in 1899. She wrote a series of magazine articles titled "New Lines of Thought", and wrote both prose and verse for a number of magazines. She wrote a number of novels and books for children as well. Later in life she lived in New Haven, Connecticut.