Like the adjacent neighborhood of Jamaica Plain to the south, Mission Hill was once a neighborhood of adjacent Roxbury before Roxbury's annexation by Boston. According to maps from the period, it was often referenced as Parker Hill (which is the name of the geographic feature in the area). After annexation (and more rapidly in recent years) the area slowly came to be considered a separate neighborhood of its own right. The majority of government, commercial, and institutional entities list "Mission Hill" in the breakdown of Boston neighborhoods and its boundaries generally agreed upon.