Latest data from Public Health England, published by Northumberland County Council, reveals there were 100 positive cases recorded on June 21.
There were 446 positive cases recorded in the week to June 21 and the infection rate for the same period was 139.3 positive cases per 100,000 population.
Here are the 19 areas of Northumberland with the highest rates.
13. Hexham East
There were 10 positive cases in Hexham East where the rate is 218.5.
14. Prudhoe North
There were 11 positive cases in Prudhoe North where the rate is 204.8.
There were 11 positive cases in Ashington's Hirst ward where the rate is 197.3.
There were eight positive cases in Longhorsley ward where the rate is 196.3.