Mewa Singh Lopoke (Punjabi: ਮੇਵਾ ਸਿੰਘ ਲੋਪੋਕੇ) was a Sikh activist in Canada who was a member of the Vancouver branch of the Ghadar Party, which called for the overthrow of British rule in India. On October 21, 1914, Mewa Singh murdered a Canadian immigration inspector, W. C. Hopkinson, a political act of violence for which he was executed. In the eyes of Sikh Canadians, Mewa Singh's assassination of Hopkinson was a display of martyrdom, one which they commemorate annually.