The Marist Brothers founded St Francis Xavier's College as a boys' school for the Bunbury region in 1954.

[6] On 5 July 2019, Rob Crothers was announced as the new principal of the school as Denise O'Meara retired from the role after 12 years.

[9] The school directed parents to keep their children at home beginning 27 March due to the ongoing coronavirus pandemic.

At the completion of Stage Two of the construction process, the campus consists of: The College currently expects work on the gymnasium (to be linked with the Read faction) to begin in late May or early June.

[19] OLMC offers courses in the general, VET, and ATAR frameworks, allowing students to achieve a WACE.

[1] As BCC Mercy, OLMC entered several Australian HPV Super Series teams with Bunbury Catholic College the in 2016-2019 City of Busselton 6 Hours events.

The entries were initiated by Mercy students in 2016,[23] and the vehicles were prepared at the OLMC campus prior to each event.

OLMC is the equal most-successful school in the South West Philosothon, with three consecutive team wins.

[30] Mercy Stories focuses on college life and events, describing itself as a "students' voice".

Parents, students, and staff were then encouraged to vote on the potential names with the 10 most popular put to Bishop Gerard Holohan for the final decision, which was announced on 22 May 2019.

The name recognises the campus's history and pays tribute to the role that the Sisters of Mercy played in its formation.

Navy "is the colour of the largest [strand] and the Mercy cross" representing the centrality of the College's faith and the unity it inspires.

Light blue "symbolises understanding and compassion", and green represents "nature and growth" while linking the College to the local landscape.