William MacTaggart was a landscape painter from Scotland. His work appears to be primarily landscapes and still-lifes, and it appears to have been heavily inspired by his grandfather's free and fervent brushwork.

MacTaggart's use of thick paint layers and vibrant colours distinguishes his paintings from those of his grandfather.

Sir William MacTaggart PRSA RA, 1903-1980

Born in Loanhead, near Edinburgh, MacTaggart was the grandson of the noted landscape and seascape painter William McTaggart. He studied at Edinburgh College of Art and was among a number of young artists, including William Gillies - a lifelong friend – and William Crozier, who formed the '22 Group. Between 1923 and the Second World War MacTaggart made annual visits to France - his first one man show was held in the church hall of St. Andrew's Scottish Church in Cannes in 1924 - and after the war he resumed his stays in that country.
MacTaggart's painting shows the influence of André Lhote, Dunoyer de Segonzac and Edvard Munch. His later work is infused with the thick impasto and glowing colour of Rouault. He taught part-time at Edinburgh College of Art from 1933 to 1956.