| St Mark's West Essex Catholic School | |
| Coordinates: | 51.7645°N 0.1036°W |
| Established: | 1965 |
| Head: | John Taylor |
| Address: | Tripton Road |
| City: | Harlow |
| County: | Essex |
| Country: | England |
| Postcode: | CM18 6AA |
| Ofsted: | yes |
| Dfeno: | 881/5458 |
| Urn: | 137058 |
| Lower Age: | 11 |
| Upper Age: | 18 |
| Houses: | Bede, Elgar, Fisher, Hume, More, Newman |
| Website: | http://www.st-marks.essex.sch.uk/ |
St Mark's West Essex Catholic School is a Roman Catholic secondary school and sixth form with academy status located in Harlow, Essex, England.
The school has six forms in each secondary year, each containing 20-30 students, with each form named after one of six historical Catholic figures (Bede, Elgar, Fisher, Hume, More, Newman, Thomas). St Mark's teaches years 7–13,[1] and was the only sixth form in Harlow until the opening of Sir Frederick Gibberd College in September 2021.
St Mark's celebrated its 50th anniversary in 2015.