The A6121 is a short cross-country road in the counties of Lincolnshire and Rutland, England. It forms the principal route between Bourne and Stamford and the A1 in Lincolnshire, continuing on through Ketton in Rutland to its junction with the A47 at Morcott. Its south-western end is at (52°35.5860′N0°38.0820′W) and its north-eastern end is at (52°45.9120′N0°24.0660′W)