Elmer Truesdell Merrill (1860 – 20 April 1936) was an American Latin scholar, born at Millville, Massachusetts. Merrill graduated from Wesleyan University in 1881. He is primarily remembered for his student edition of the Roman poet Catullus and for his studies on the text and tradition of the Letters of Pliny the Younger, culminating in his 1914 Teubner edition, which constituted an important basis for the works of later scholars.