Alger Baldwin Chapman (November 2, 1904 - November 3, 1983) was an attorney, businessman, New York state official, and adviser to New York Governor Thomas Dewey. Chapman was involved in Republican politics in New York, and managed several campaigns in the state. Chapman was the New York manager for Dewey's unsuccessful presidential bid, and remained involved in Republican politics until the age of 70. After leaving state government in the early 1950s, he entered the corporate world, heading one corporation and holding directorships in others. He died in 1983.