Alexander Helwig Wyant (January 11, 1836 – November 29, 1892) was an American landscape painter.

His early works belonged to the Hudson River School, with its direct pastoral narrative, but evolved into the more moody and shadowy Tonalism.

His early paintings followed closely the Hudson River School tradition, while the later—infused with low-key colors, atmospheric features and poetic interpretation—are representative of tonalism.

After 1866 Wyant gradually shifted toward a more fluid handling of paint, with increasing reliance on a palette emphasizing shades of white, gray, and the earth colors.

A partial stroke while on a government expedition to Arizona and New Mexico in 1873 led to paralysis of his right arm.

In his later years Wyant's solitary, introspective mood came to blend more closely than ever with his landscapes, especially those from the Arkville area at the Pakatakan Artists Colony, where a kindred spirit, John Francis Murphy, also worked.