Alfred Wallin (February 12, 1836 – January 9, 1923) was an American judge who served one of the first three justices of the Supreme Court of North Dakota from 1889 to 1902.

He served in the United States Army during the American Civil War in 1861 and 1862, reenlisted in 1864, and was mustered out in 1865.

Wallin declined renomination and retired at the end of his term on December 31, 1902, after having served roughly thirteen years and one month.

After leaving the court, due to increasing deafness, Wallin did not resume his practice of law.

[1] Alfred Wallin and Ellen Gray Keyes were married on January 1, 1868, in Elgin, Illinois.