Yaƙin Tewkesbury wani gagarumin yaƙi ne da aka yi a ranar 4 ga Mayu, 1471, lokacin Yaƙin Roses, jerin yaƙe-yaƙe na basasa a Ingila tsakanin House of Lancaster da House of York don sarautar Ingila. An yi yakin a Tewkesbury, wani gari a Gloucestershire, Ingila, kuma ya haifar da gagarumar nasara ga House of York, wanda ya kawo karshen da'awar Lancastrian ga kursiyin. Yakin ya ga mutuwar Yarima Edward na Lancastrian da kamawa da kuma kisa da aka yi wa Sarauniyar Henry VI, Margaret na Anjou, wanda ya karfafa 'yan Yorkist a kan kambin Ingila.