St Mark's West Essex Catholic School is a Roman Catholic secondary school and sixth form with academy status located in Harlow, Essex, England.

St Mark's West Essex Catholic School
Address
Tripton Road Harlow , Essex , CM18 6AA England
Coordinates	51°45′52″N 0°06′13″E / 51.76448°N 0.10355°E / 51.76448; 0.10355
Information
Type	Academy
Religious affiliation(s)	Roman Catholic
Established	1965
Department for Education URN	137058 Tables
Ofsted	Reports
Head teacher	John Taylor
Gender	Coeducational
Age	11 to 18
Houses	Bede, Elgar, Fisher, Hume, More, Newman
Website	http://www.st-marks.essex.sch.uk/

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.