Myrna Docia Sharlow (19 July 1893 – after 1935) was an American soprano who had an active performance career in operas and concerts during the 1910s through the 1930s. She began her career in 1912 with the Boston Opera Company and became one of Chicago's more active sopranos from 1915–1920, and again in 1923–1924 and 1926–1927. She sang with several other important American opera companies during her career, including one season at the Metropolitan Opera. She made only a handful of opera appearances in Europe during her career, most notably singing in the English premiere of Riccardo Zandonai's Francesca da Rimini at Covent Garden in 1914. Her repertoire spanned a wide range from leading dramatic soprano roles to lighter lyric soprano fair and comprimario parts. She even performed a few roles traditionally sung by mezzo-sopranos or contraltos.
Born in Jamestown, North Dakota, Sharlow moved with her family at a young age to St. Louis, Missouri. Her father worked variously as a school teacher, river boatman, and policeman. She studied piano with Marcus Epstem in St. Louis and for two years studied singing with Ferdinand Jaeger at the Beethoven Conservatory of Music in St. Louis. She also studied dramatic acting at the Perry School of Oratory and foreign languages at the Berlitz School in Saint Louis. She then studied in New York City with Frederick Bristol while beginning her opera career in Boston.
Sharlow made her professional opera debut in Boston in 1912 at the age of 19 with the Boston Opera Company (BOC) as Musetta in Giacomo Puccini's La bohème. She was also heard that year as Stella and the voice of Antonia's mother in The Tales of Hoffmann. The following year she performed in several more soubrette and comprimario roles with the BOC. She had her first major triumph in Boston in March 1914 when she replaced an ailing Nellie Melba as Mimi in La bohème at the last minute. Melba herself stayed in the wings to encourage the young singer and prompt her between scenes about the correct blocking. Her performance was given glowing reviews in the Globe the following day. The BOC went bankrupt in early 1915, and Sharlow was forced to seek employment elsewhere. However, she did return to Boston in 1916 to sing the title role in Georges Bizet's Carmen in concert with the Boston Symphony Orchestra and tenor Arthur Hackett as her Don José.