Elizabeth Adela Forbes (née Armstrong; 29 December 1859 – 16 March 1912) was a Canadian painter who was primarily active in the UK. She often featured children in her paintings and School Is Out (painted in Newlyn) is one of her most popular works. She was friends with the artists James Abbott McNeill Whistler and Walter Sickert, both of whom influenced her work. Her etchings in particular are said to show the influence of Whistler.
After studying and working in continental Europe, Forbes settled in Newlyn, England, where she raised her son and established a school with her husband, Stanhope Forbes. She had her works exhibited in notable shows and won medals for her works. Her paintings are in collections of museums in Canada, United States and England.