Named after the co-founder of Montreal, Jeanne Mance, the park is located along Park Avenue, opposite Mount Royal, and just south of Mount Royal Avenue.

[3][4][5] According to local tradition, the park was named after one Fletcher, who lived on the outskirts of the grounds and pastured his cows there.

In 1879, Fletcher's Field was identified by the Pharmaceutical Society of Great Britain as a notable source of Hyoscyamus niger, a psychoactive plant.

[6] In September 1910, during the Montreal Eucharistic Congress, there was a campaign to rename the park in recognition of the founder of the Hôtel-Dieu de Montréal.

The plaza entrance of Jeanne Mance Park opposite the Sir George-Étienne Cartier Monument is affectionately known as Place Fletcher's Field, serving as a reminder of the park's former name.