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.
1. Berwick East
There were five positive cases in Berwick East where the rate is 103.3.
2. Ponteland West
The rate is 99.0 in Ponteland West.
3. Bedlington Central
The rate is 76.0 in Bedlington Central.
The rate is 59.5 in Newsham ward.