Humbird is an unincorporated census-designated place in the Town of Mentor in Clark County, Wisconsin, United States.

The second of five children of Solomon and Susan Humbert, Jacob was married to Eleanor McKee in 1835.

He built Dom Pedro Secundo Railroad in Brazil from Rio de Janeiro to the interior of the country.

In 1867 Humbird and D. A. Baldwin built the main line of the West Wisconsin Railroad from Elroy to Hudson.

Although named Emerson Lake, it is commonly called Humbird Pond.