Orlando Gray Wales (also O.G. Wales) (1865–1933) was an American landscape painter and Pennsylvania impressionist who lived and painted in Allentown and the Lehigh Valley region of Pennsylvania. Wales was considered to be one of the best still-life artists of the day. Wales was born in Philadelphia, Pennsylvania and studied at the Pennsylvania Academy of Fine Arts with William Merritt Chase and Alphonse Mucha. He maintained a studio at Tenth and Hamilton Streets in Allentown.