| William Gwinn Mather | |
| Birth Date: | 22 September 1857 |
| Birth Place: | Cleveland, Ohio, United States |
| Death Place: | Bratenahl, Ohio, United States |
| Restingplace: | Lake View Cemetery |
| Alma Mater: | Trinity College |
William Gwinn Mather (September 22, 1857 – April 5, 1951)[1] was an American industrialist.
Mather was born in Ohio and attended Trinity College for his undergraduate and MA degrees. Mather headed the Cleveland-Cliffs Iron Company for 50 years from 1890 through 1940. During his tenure he consolidated several mining operations and diversified into iron-ore industries and steel operations. The company's flagship bulk freighter was named in his honor, and today serves as a maritime museum in Cleveland, Ohio.
Mather is also known for the palatial estate, Gwinn, he built in Bratenahl, Ohio, a luxury suburb east of Cleveland. The estate’s gardens were designed by Charles A. Platt, Ellen Biddle Shipman, and Warren H. Manning.[2] The gardens, named for Mather's mother Elizabeth Lucy Gwinn, include a mixture of formal and "wild" gardens and extensive statuary and fountains designed by significant sculptors including Paul Manship.
In 1901, Mather purchased land in Marquette County, Michigan for his company's operations. He had Warren H. Manning design a residential community to support his operations. On June 24, 2002, Gwinn, Michigan was listed in the National Register of Historic Places as the "Gwinn Model Town Historic District, Forsyth Township, Marquette County, Michigan".