| Honorific-Prefix: | The Honorable |
| Alvin C. Reis | |
| Office: | Wisconsin Circuit Court Judge |
| Term Start: | July 1936 |
| Term End: | January 24, 1956 |
| Predecessor: | Albert G. Zimmerman |
| Successor: | Richard W. Bardwell |
| State1: | Wisconsin |
| State Senate1: | Wisconsin |
| District1: | 26th |
| Term Start1: | January 1, 1933 |
| Term End1: | January 1, 1935 |
| Predecessor1: | Glenn D. Roberts |
| Successor1: | Harold M. Groves |
| State Assembly2: | Wisconsin |
| District2: | Dane 1st |
| Term Start2: | January 1, 1927 |
| Term End2: | January 1, 1931 |
| Predecessor2: | Herman W. Sachtjen |
| Successor2: | Harold M. Groves |
| Birth Date: | 24 March 1892 |
| Birth Place: | Evansville, Indiana |
| Death Place: | Madison, Wisconsin |
| Restingplace: | Forest Hill Cemetery Madison, Wisconsin |
| Party: | Republican |
| Allegiance: |  United States |
| Rank: | Major |
| Serviceyears: | 1918 - 1919 |
| Battles: | World War I |
Alvin C. Reis (March 24, 1892January 24, 1956) was an American lawyer, politician, and judge. He was a Wisconsin Circuit Court Judge for the last 20 years of his life. Earlier in his career, he was a member of the Wisconsin State Assembly and the Wisconsin State Senate, and served as a United States Army officer in World War I.
Reis was born on March 24, 1892, in Evansville, Indiana.[1] He graduated from the University of Wisconsin-Madison and Harvard Law School. During World War II, he served as a major in the United States Army. Battles Reis took part in include the Battle of Château-Thierry, the Battle of Saint-Mihiel and the Meuse-Argonne Offensive. He died on January 24, 1956, in Madison, Wisconsin, and is buried at Forest Hill Cemetery.
Reis was elected to the Assembly in 1926 and 1928 and to the Senate in 1932. Later, he became a judge on the Wisconsin Circuit Court. He was a Republican.
| colspan="6" style="text-align:center;background-color: #e9e9e9;"| General Election, November 2, 1926
| colspan="6" style="text-align:center;background-color: #e9e9e9;"| General Election, April 1930| colspan="6" style="text-align:center;background-color: #e9e9e9;"| General Election, November 4, 1930
| colspan="6" style="text-align:center;background-color: #e9e9e9;"| Primary Election, September 1932| colspan="6" style="text-align:center;background-color: #e9e9e9;"| General Election, November 8, 1932
| colspan="6" style="text-align:center;background-color: #e9e9e9;"| General Election, April 1937
| colspan="6" style="text-align:center;background-color: #e9e9e9;"| General Election, April 1, 1941