| Catholic Memorial High School | |
| Motto: | Caritas in Omnibus |
| Motto Translation: | Charity in All Things |
| Established: | 1949 |
| Type: | Private, Coeducational |
| Religion: | Roman Catholic |
| Grades: | 9–12 |
| Enrollment: | 660 |
| Enrollment As Of: | 2016-2017 |
| Faculty: | 80 |
| Location: | 601 East College Avenue |
| City: | Waukesha |
| State: | Wisconsin |
| County: | (Waukesha County) |
| Zipcode: | 53186 |
| Country: | USA |
| Coordinates: | 43.0025°N -88.2203°W |
| Oversight: | Roman Catholic Archdiocese of Milwaukee |
| President: | Donna Bembenek |
| Accreditation: | North Central Association of Colleges and Schools[1] |
| Mascot: | Crusader |
| Colors: | Marian Blue & Pontifical Gold |
| Athletics Conference: | Classic 8 Conference |
| Yearbook: | The Knight |
| Newspaper: | The Crusaders |
| Free Label3: | Athletic Director |
| Free Text3: | Matthew Bergan |
Catholic Memorial High School (or CMH) is a co-educational Catholic high school in Waukesha, Wisconsin. Established in 1949, it is a member of the National Catholic Educational Association and is a World School in the International Baccalaureate Organization.