| Governor William McWillie | |
| Office: | 22nd Governor of Mississippi |
| Term Start: | November 16, 1857 |
| Term End: | November 21, 1859 |
| Predecessor: | John J. McRae |
| Successor: | John J. Pettus |
| Office2: | Member of the U.S. House of Representatives from Mississippi's 3rd district |
| Term Start2: | December 3, 1849 |
| Term End2: | March 3, 1851 |
| Predecessor2: | Patrick W. Tompkins |
| Successor2: | John D. Freeman |
| Office3: | South Carolina State Senate South Carolina House of Representatives |
| Term Start3: | 1854 |
| Term End3: | 1892 |
| Birth Date: | 17 November 1795 |
| Birth Place: | Camden, South Carolina, United States |
| Death Place: | Madison County, Mississippi, United States |
| Restingplace: | Kirkwood Cemetery, Camden, Mississippi |
| Spouse: | Nancy Cunningham Catherine Anderson |
| Children: | 23 |
| Alma Mater: | University of South Carolina |
| Allegiance: | (prior to 1861) Confederate States of America 1861–1865 |
| Branch: | (War of 1812) |
| Battles: | War of 1812 |
William McWillie (November 17, 1795 – March 3, 1869) was the twenty-second governor of Mississippi from 1857 to 1859. He was a Democrat.
He was born near Liberty Hill, Kershaw County, South Carolina, on November 17, 1795. His father Colonel Adam McWillie was in command of the 2nd Regiment SC militia during the War of 1812, and William served as an adjutant in his father's regiment in the war.[1]
McWillie graduated from South Carolina College (now the University of South Carolina) in 1817. He then began the study of law and was admitted to the bar in 1818.[2]
He was married to Nancy Cunningham (1799-1827) and Catherine Anderson (1812–1873), daughter of Dr. Edward H. Anderson of Camden, South Carolina, and granddaughter of a noted officer of the Maryland Line.[3]
Between 1836 and 1840, he served in both the South Carolina House of Representatives and the South Carolina Senate. In 1845 he moved to Mississippi. He was elected to the United States House of Representatives in 1849, serving from December 3, 1849 to March 3, 1851. In 1858 he became Governor of Mississippi, serving until 1860. McWillie died in Kirkwood, Madison County, Mississippi, on March 3, 1869. He is buried in Kirkwood Cemetery, near Camden, Mississippi, the town he founded and named for his hometown of Camden, South Carolina.[4] [5]
His son Adam McWillie (1821 to 1861) was killed in the Civil War during the First Battle of Bull Run.[6]