Kai Sofus Marinus Jensen (25 February 1897 <unk> 31 May 1997) akanga ari mutambi weDenmark uyo akakwikwidza pa1924 Summer Olympics apo, achimiririra Københavns Idræts Forening, akabviswa mu quarterfinals yevarume 400 metres, semifinals yevarume 800 metres uye varume 4 × 100 metres relay
. Mumakwikwi okupedzisira akakwikwidzana naPoul Schiang, Henri Thorsen, naMogens Truelsen. Akaberekerwa muCopenhagen uye akafira muBirkerød pazera remakore 100.