Alexander Lafayette Chew "Alec" Wilder (February 16, 1907 – December 24, 1980) was an American composer.
Wilder was born in Rochester, New York, United States, to a prominent family; the Wilder Building downtown (at the "Four Corners") bears the family's name. As a young boy, he traveled to New York City with his mother and stayed at the Algonquin Hotel. It would later be his home for the last 40 or so years of his life. He attended several prep schools, unhappily, as a teenager. Around this time, he hired a lawyer and essentially "divorced" himself from his family, gaining for himself some portion of the family fortune.