Counties 1 Durham & Northumberland

Counties 1 Durham & Northumberland, formerly known as Durham/Northumberland 1 is an English amateur rugby union competition. The league consists of twelve clubs, and is in the seventh tier of the English rugby union system; one of the sixteen regional leagues and is the highest level of local rugby in North East England. The champions are promoted to Regional 2 North, a division with a wider geographical area that also encompasses the Yorkshire region. The last two clubs are relegated to Counties 2 Durham & Northumberland.

Each season, two teams from the league are selected to take part in the RFU Intermediate Cup, a national competition for clubs in the seventh tier: one is affiliated with the Durham County RFU, the other is affiliated with the Northumberland RFU.