Charles Lane Poor (January 18, 1866 – September 27, 1951) was an American astronomy professor, noted for his opposition to Einstein's theory of relativity.

He graduated from the City College of New York and received a PhD in 1892 from Johns Hopkins University.

[3] For 25 years, Poor was chairman of the admissions committee of the New York Yacht Club.

He served several terms as mayor of Dering Harbor on Long Island, New York.

Poor also invented a circular slide rule used with a sextant for yachting navigation.