Hector Lake, Glacial lake in Banff National Park, Canada.

Hector Lake is a glacial lake on the Bow River in the Waputik Range of the Canadian Rockies, in Banff National Park, Alberta. It lies in a valley north of the Waputik Icefield, between Pulpit Peak, Mount Balfour, Crowfoot Mountain and Bow Peak, with Hector Glacier and Mount Hector across the Bow River. It covers 5.23 km2.

Hector Lake takes its name from James Hector, the geologist and naturalist of the Palliser Expedition, the British survey of western Canada in the late 1850s. The lake sits on the Bow River in the Waputik Range, between Pulpit Peak, Mount Balfour, Crowfoot Mountain and Bow Peak, with Hector Glacier and Mount Hector across the river.

The lake is named after James Hector, the geologist and naturalist of the Palliser Expedition. It lies on the Bow River in the Waputik Range, and Hector Glacier and Mount Hector stand on the opposite bank of the river. It is the second lake from the headwaters of the Bow, after Bow Lake, and covers 5.23 km².

Hector Lake lies beside the Icefields Parkway in Banff National Park, between Bow Lake and the Waputik Range. The shoreline is not served by a maintained trail from the road; access is by informal routes, and the terrain between Pulpit Peak, Mount Balfour, Crowfoot Mountain and Bow Peak is steep. Snow can linger at this elevation into early summer.

Researchers study sediment layers at this lake to understand changes in geology and environment over time. This scientific work makes the site valuable for learning about the region's climate history.