Humbird is an unincorporated census-designated place located in Clark County, Wisconsin, United States. Humbird is located on U.S. Route 12 north-northwest of Merrillan, in the town of Mentor. Humbird has a post office with ZIP code 54746. As of the 2010 census, its population was 266.
Humbird contains a pond, a bluff, farm land, recreational land, and several ATV trails. The pond is 13 acres (0.053 km2) in area and 8 feet (2.4 m) at its deepest point. It is named Emerson Lake but is commonly called Humbird Pond.
Humbird was founded by Jacob Humbird who was born at Ligonier, Pennsylvania on July 31, 1811. He was the second of five children born to Solomon and Susan Humbert. Jacob was married to Eleanor McKee in 1835 and had 4 sons and 4 daughters. Jacob and his brother pursued a career in railroad building. He built Dom Pedro Secundo Railroad in Brazil from Rio De Janeiro to points in the interior. In 1867 Jacob Humbird and D.A. Baldwin built the main line of the West Wisconsin Railroad from Elroy to Hudson. The tracks were laid to Humbird in late 1869. The depot opened for business on January 1, 1870.