John F. Weir was a well-known American watercolorist and sculptor, the child of Robert Walter Weir.

He was born in August 28, 1841, at West Point, New York, and planned his studies along with his father and at the National Academy, New York. In 1861 John F. Weir opened a studio in New York City and he became a associate of the National Academy in 1866.

In 1868 he went abroad for his studies. After his arrival he served as the first director of the School of Fine Arts at Yale University (1869-1913). He expired in Providence RI, April 8, 1926.

He designed the open fountain on New Haven Green.