Dame Isobel Baillie, DBE (9 March 1895 – 24 September 1983) was a Scottish soprano, popular in opera, oratorio and lieder. She was regarded as one of the 20th century's great oratorio singers.
Isobel Baillie was born in Hawick, Scottish Borders, in 1895. She married Henry Leonard Wrigley in 1917. They had one daughter, Nancy. Isobel worked in a music shop and as a clerk at Manchester Town Hall, and made her orchestral debut with the Hallé Orchestra in 1921 under the name Bella Baillie, having already appeared in several Manchester chamber concerts series. After studies in Milan, she won immediate success in her opening season in London in 1923.
Her favourite work was Handel's Messiah, of which she gave more than 1,000 performances during her career. She was often in demand for choral works; apart from Messiah, she was noted in Haydn's The Creation, Mendelssohn's Elijah, and Brahms's A German Requiem. In 1933 she became the first British performer to sing in the Hollywood Bowl in California. In 1937 Arturo Toscanini chose her to sing Brahms' Requiem.
Her performances in Gluck's Orpheus (always in English) and Gounod's Faust were very popular. However, her strength was in British music, including Vaughan Williams' Serenade to Music (of which she was one of the original singers) and Elgar's The Kingdom. With the exception of 1933, she sang at the Three Choirs Festival every year from 1929 to 1955. Miss Baillie sang 'Messiah' for the Halle Orchestra annually for twenty-six consecutive seasons and for the Royal Choral Society at the Royal Albert Hall on thirty-three occasions. In all she sang this work for over fifty years.