The municipality has about 63,000 inhabitants and covers an area of about 107 km2 (41 sq mi).
Stichtse Vecht was formed on 1 January 2011 by a merger of the municipalities of Breukelen (in the west), Maarssen (in the east) and Loenen (in the north).[6]
Within its boundaries are the Maarsseveense Plassen, which are recreational lakes. Northeast it borders the Loosdrechtse Plassen, also recreational lakes, which lie in neighbouring municipality of Wijdemeren.