Durham/Northumberland 1 is an English amateur rugby union competition. The league consists of fourteen clubs, and is the seventh tier of the English rugby union system, as one of the 16 regional leagues, though is the highest level of local rugby in the North East of England. The champions are automatically promoted to North 1 East, a division with a wider geographical area that also encompasses the Yorkshire region. The runners-up participate in a play-off against the runners-up from the equivalent regional league, Yorkshire 1, for promotion. The bottom two are relegated to Durham/Northumberland 2.