The ward, which covers an extended area including Alnmouth and Lesbury, also has among the highest case rates.
Wards in Berwick and Hexham also have among the highest case numbers and rates.
Data from Public Health England, supplemented by the ONS, shows the Covid-19 rate for Northumberland was 232 per 100,000 on January 23.
There were 743 positive cases in the week to that date.
The figures reveal a marginal fall in the rate and number of cases over the past week. On January 16 the rate was 249.8 and there were 800 confirmed positive cases.
Here are the 13 areas of Northumberland with the highest number of weekly cases.