Emma Scarr Booth (née , Scarr; after first marriage, (unknown); after second marriage, Booth; pen names, various; April 25, 1835 – 1927) was a British-born American author. Born in England, she emigrated to the United States as a child. She was the author of three volumes, entitled Karan Kringle's Journal; A Willful Heiress; and Poems. Additionally, she composed numerous songs and instrumental pieces.