Omineca River, Brook in northern British Columbia, Canada

The Omineca River rises east of Bear Lake in the British Columbia Interior and runs about 220 km, turning east at Old Hogem, passing Germansen Landing and cutting north through the Omineca Mountains. Its lower course from Old Hogem lies in Omineca Provincial Park and Protected Area. Its largest tributary, the Osilinka River, joins from the left just before the mouth in the Omineca Arm of Williston Lake.

The Omineca River was a tributary of the Finlay River until the W. A. C. Bennett Dam was built and Williston Lake formed. Its former lower course took in the Mesilinka River from the left before joining the Finlay on the right bank. In the 1860s the Omineca Country around its basin was touched by the Omineca Gold Rush.

The name comes from a Sekani word that Father Adrien-Gabriel Morice translated as 'lake-like or sluggish river', describing the water's slow flow. The Omineca Country region took its name from the river, and in the 1860s the area was touched by the Omineca Gold Rush.

The lower course from Old Hogem downstream lies within Omineca Provincial Park and Protected Area. The river has no notable rapids, so it is considered an easy canoe route; Arctic grayling are among its fish. Germansen Landing and Old Hogem are the main reference points along its banks.

Father Adrien-Gabriel Morice traced the name to a Sekani word meaning 'lake-like or sluggish river', not to a Tse'khene phrase. The Omineca once joined the Finlay River; since the W. A. C. Bennett Dam raised Williston Lake it ends in the lake's Omineca Arm.