| Lou Cusanovich | |
| Office: | Member of the California State Senate |
| Term Start: | December 6, 1976 |
| Term End: | December 1, 1980 |
| Predecessor: | H. L. Richardson |
| Successor: | Edward M. Davis |
| Constituency: | 19th district |
| Term Start1: | January 2, 1967 |
| Term End1: | December 6, 1976 |
| Constituency1: | 23rd district |
| Preceded1: | Donald L. Grunsky |
| Succeeded1: | David Roberti |
| State Assembly2: | California |
| District2: | 64th |
| Term Start2: | December 17, 1957 |
| Term End2: | January 2, 1967 |
| Preceded2: | Patrick D. McGee |
| Succeeded2: | Patrick D. McGee |
| Birth Date: | 14 June 1912 |
| Birth Place: | Los Angeles, California, U.S. |
| Party: | Republican |
| Spouse: | Elizabeth McElroy[1] |
| Children: | 2, Michael and Gerald |
Lou Cusanovich (June 14, 1912 – February 6, 1985)[2] was an American politician who was a member of the California State Assembly from 1957 to 1966 and a member of the California State Senate from 1966 to 1980.
Cusanovich represented the San Fernando Valley in the California State Legislature for 23 years. He was a member of the Republican Party. In 1970, he served as the Majority Leader of the California State Senate.[3]