Bert L. Rule (né Albert Lyman Rule; 12 August 1891 Brooklyn; – 17 August 1978 East Patchogue, New York) was an American composer, arranger, singer, and pianist of popular songs of Tin Pan Alley and the vaudeville genre. Rule composed and published his music, some of which became national hits, from 1913 to 1934. He worked in publishing houses, namely M. Witmark & Sons and performed in vaudeville theaters throughout the country roughly during the same period.