Ira Sherwin Haseltine[a] (July 13, 1821 – January 13, 1899) was a farmer and lawyer who was active in Wisconsin and Missouri.

[1][2] He was raised and educated in Andover and in Waukesha County, Wisconsin, and taught school in Natchez, Mississippi for three years.

[1] He moved to what is now Richland Center, Wisconsin in 1842; Haseltine was one of the founders of the city in 1851, and was credited with both planning its layout and selecting its name.

[1] Haseltine studied law in Milwaukee with Don A. J. Upham; he was admitted to the bar in 1842 and practiced in Richland Center.

[1] In the 1870s, Haseltine became an adherent of the Greenback Party, which opposed corporate monopolies and efforts to return to the pre-American Civil War gold standard.