Nicomen Island is an island in the Fraser River

Fraser River

The Fraser River is the longest river within British Columbia, Canada, rising at Fraser Pass near Mount Robson in the Rocky Mountains and flowing for , into the Strait of Georgia at the city of Vancouver. It is the tenth longest river in Canada...

 east of Mission

Mission, British Columbia

Mission, the core of which was formerly known as Mission City, is a district municipality in the province of British Columbia, Canada. It is situated on the north bank of the Fraser River overlooking the City of Abbotsford and with that city is part of the Central Fraser Valley. Mission is the...

 and between Deroche

Deroche, British Columbia

Deroche is a farming and railway community on the Canadian Pacific Railway and BC Highway 7 located approximately 110 km east of Vancouver, British Columbia, Canada. Deroche is adjacent to the eastern end of Nicomen Island, from which it is separated by the Nicomen Slough...

 (E) and Dewdney

Dewdney, British Columbia

Dewdney is an unincorporated community in the Central Fraser Valley of British Columbia, Canada, about 15 km east of the town of Mission. It was incorporated as a district municipality in 1893 but has since become unincorporated and is now represented as part of Electoral Area 'G' in the...

 (W). Located on the river's north side, and separated from the foot of the Douglas Ranges

Douglas Ranges

The Douglas Ranges are a subrange of the Pacific Ranges of the Coast Mountains of the Canadian province of British Columbia, about 70 km east of downtown Vancouver, north of the Fraser River and between the valleys of Stave and Harrison Lakes. They are approximately 4900 km² in area...

 by Nicomen Slough, the island is near-totally given over to agriculture and constitutes a rural community in its own right, although "downtown Dewdney" is located near its eastern end and the Indian Reserve of the Lakahahmen First Nation is located about mid-way along its north side.