Eunice Alberts (1927–2012) was an American contralto who had an active career as a concert soloist and opera singer during the 1950s through the 1980s. She began her career as a concert soloist with the Boston Symphony Orchestra at the young age of 19 and quickly became a lauded oratorio singer during the late 1940s and the early 1950s. She began her opera career with the New York City Opera in 1951. She went on to have a successful opera career with companies throughout the United States, ultimately forging a strong partnership with Sarah Caldwell's Opera Company of Boston that lasted from 1961 to 1988. She notably sang in a number of United States premieres in Boston and appeared in a few world premieres in New York City. Although Alberts made a number of impressive achievements in the field of opera, her legacy remains in the numerous appearances and recordings she made with major symphony orchestras in the United States. She was particularly successful as a soloist in the great choral works of J.S. Bach, Joseph Haydn, Wolfgang Amadeus Mozart, and Ludwig van Beethoven.
Born in Boston, Alberts attended the Girls' Latin School in her native city during her youth; earning her diploma there in 1940. She was later awarded the school's outstanding alumni award in 1990. She studied singing with Cleora Wood and Rosalie Miller at the Longy School of Music, earning a certificate in vocal performance. She also studied at the Tanglewood Music Center where she drew the attention of conductor Serge Koussevitzky. She made her concert debut with the Boston Symphony Orchestra (BSO) as the contralto soloist in Beethoven's Symphony No. 9 at the Tanglewood Music Festival in August 1946. Shortly thereafter she joined a madrigal group led by Nadia Boulanger with which she toured North America and Europe for two years. She made several more appearances with the BSO during the late 1940s and early 1950s in annual appearances at Tanglewood, singing as a soloist in works like Bach's Mass in B Minor (1950) and Beethoven's Missa Solemnis (1951).