Alfred Rider Page (October 7, 1859 – February 3, 1931) was an American lawyer, judge, and politician from New York.
Page was born in Carlinville, Illinois, and relocated with his family to Brooklyn in 1874. He graduated from New York University School of Law in 1880, was admitted to the bar, and practiced in New York City. In 1886, he married Elizabeth M. Roe, and they had three children including the novelist Elizabeth Page. Page was a member of the New York State Senate (19th district) from 1905 to 1908, sitting in the 128th, 129th, 130th and 131st New York State Legislatures. He was a justice of the New York Supreme Court from 1910 to 1923. In 1915, he presided over the trial of Harry K. Thaw for conspiring to escape from the Matteawan State Hospital for the Criminally Insane. He sat on the Appellate Division (First Dept.) from 1916 to 1923. He died on February 3, 1931, in Southampton, New York, from pneumonia.