Data from Public Health England, published by Northumberland County Council, reveals there were 53 confirmed positive cases in the county in the week to May 10.
The infection rate per 100,000 is 16.55.
Here are the 10 areas of Northumberland with the highest rates.
There were 23 positive cases in Pegswood ward in the week to July 19. The rate is 448.9.
2. Cramlington West
There were 22 positive cases in Cramlington West where the rate is 390.9.
3. Seaton with Newbiggin West
There were 20 positive cases in Seaton with Newbiggin West where the rate is 384.8.
4. Ponteland East and Stannington
There were 17 positive cases in Ponteland East and Stannington where the rate is 383.7.