| École Secondaire Catholique l'Essor | |
| Motto: | fr|l'Aigle seul à le droit de fixer le soleil |
| Motto Translation: | "Only the eagle has the right to reach for great heights" |
| Address: | 13605 St. Gregory Road |
| City: | Tecumseh |
| Province: | Ontario |
| Postcode: | N8N 3E4 |
| Country: | Canada |
| Coordinates: | 42.3145°N -82.8629°W |
| Fundingtype: | Publicly funded |
| Religious Affiliation: | Catholic |
| Schooltype: | Separate High school |
| Schoolboard: | Conseil scolaire catholique Providence |
| Number: | 728772[1] |
| Principal: | Tanya Basic |
| Grades Label: | Grades |
| Grades: | 7–12 |
| Enrollment: | 648 |
| Enrollment As Of: | August 2017 |
| Language: | French |
| Colours: | Orange, Brown, White (1979–1995) Orange, Black, White (1995 – present) |
| Mascot: | Eagle |
| Lastupdate: | 19 November 2017 |
École secondaire catholique l'Essor is a publicly funded separate (Catholic), French-language high school located in Tecumseh, Ontario, Canada (formerly St. Clair Beach), established in 1979. It serves the Francophone population of Essex County. The name French: l'Essor, coined by local resident Florence Limoges, is a portmanteau combining "Essex" and "Windsor". French: [[wikt:essor#French|Essor]] also refers to the French word "to take flight". The school belongs to the Conseil scolaire catholique Providence.
The small school participates in a wide variety of local activities in the Francophone community. A notable example is the Franco Bowl, an annual football match against neighboring Windsor's French Catholic high-school, École secondaire E.J. Lajeunesse. The school has a very high percentage of graduates and high test scores.
Sports include: Football, Hockey, Basketball, Soccer, Volleyball, Wrestling, Golf, Tennis, Badminton, Swimming, Softball, Baseball, Cross Country, Track and Field