The hamlet, originally known as just
Pleasant, started as a farming community centered around the 10th Sideroad and 3rd Line West intersection (today's Bovaird Drive and Creditview Rd) in
Chinguacousy Township between the then-smaller Town of Brampton and
Georgetown. The
Grand Trunk Railway came through Pleasant in 1856, but no station was built. Over time, the hamlet acquired a church, blacksmith shop, inn, and local meeting hall. The province improved and designated the 10th Sideroad as
Highway 7 through Pleasant in the 1920's, and transferred it to
Peel Region in 1997 as a western extension of Bovaird Drive. Pleasant became part of the City of Brampton when Chinguacousy Township was
amalgamated with the Town of Brampton in 1974. In the 1990's, the area started being referred to as Mount Pleasant. Much of the area around Mount Pleasant remained farmland until the construction of the Mount Pleasant GO station and encroaching suburban development in the mid-2000's. Since then, the community was developed as a transit-oriented urban village around the station, which serves as a transit hub for both GO Transit and
Brampton Transit services. The former
Canadian Pacific Railway Brampton Station (once located in downtown Brampton, and saved by the Brampton Historic Society in 1981) was reconstructed in Mount Pleasant as part of the community centre.{{cite web | title=CPR Station Reconstruction | website= City of Brampton | date=2025-05-20 | url=https://www.brampton.ca/EN/Business/planning-development/projects-studies/Pages/cprstation.aspx | ref={{sfnref| City of Brampton == Demographics ==