Agassiz Ice Cap, Arctic glacier in Ellesmere Island, Nunavut, Canada.

Agassiz Ice Cap is an ice cap of about 21,000 km2 on the central eastern side of Ellesmere Island, Nunavut, Canada. It lies between the North Ellesmere ice field to the north and the Prince of Wales Icefield to the south. It was formerly called Agassiz Glacier and is named after Louis Agassiz.

This glacier formed during the last ice age and has persisted in this Arctic region for thousands of years. Scientists have been extracting ice cores from this location since the 1970s to study Earth's climate and atmospheric history.

Inuit communities in Nunavut observe changes at this glacier and contribute their knowledge of the Arctic landscape to research projects conducted on site. Their understanding of ice patterns and seasonal shifts helps shape the scientific work happening here.

Reaching this ice field is extremely difficult and requires specialized equipment plus careful preparation for harsh Arctic conditions. Visits are essentially limited to scientific expeditions or professional research projects.

The ice cap is named after Swiss-American naturalist Louis Agassiz, a pioneer of glacial theory. Its meltwater drains east into Lake Tuborg, a detail easy to miss when looking only at the ice surface.