Big Creek is a watercourse in Norfolk County, Ontario.
It empties into Lake Erie, at Port Rowan, at Long Point.
Eco-tourists visit the creek, including boating excursions, to sample its examples of Carolinian forest - rare for Ontario.
[6] In 1986 the United Nations designated the Big Creek Marsh, at the mouth of Big Creek, forming the apex of Long Point, as forming the Long Point Biosphere Reserve.
The east side of the spit was a natural, marshy, wetland, until the construction of the Long Point Causeway in 1927.