William L. Greenly (September 18, 1813 – November 29, 1883) was a politician from the U.S. state of Michigan serving as Governor.

Greenly was born in Hamilton, New York. He graduated from Union College in Schenectady, New York in 1831, then studied law and was admitted to the bar in 1834. He moved to Adrian, Michigan in 1836.

He was a member of the state senate 1839 to 1840 and 1842 to 1843. He was Lieutenant Governor from 1846 to 1847 and became Governor on March 4, 1847 after the resignation of Alpheus Felch to take a seat in the U.S. Senate. He completed Felch's term through January 3, 1848.

He was mayor of Adrian, Michigan in 1858 and was later Justice of the Peace there. He is interred at Oakwood Cemetery in Adrian.

External links

• Biographical Protraits from 1892 Portrait & Biographical Album of Genesee, Lapeer & Tuscola Counties, Chapman Bros