Latest data from Public Health England reveals there were 3,419 positive cases in the county in the week to December 28.
More than 500 positive cases have been recorded in each of the past three days.
The countywide infection rate is 1,056 positive cases per 100,000 people – the highest it has been since the pandemic began.
Here are the 15 areas with the highest Covid rates.
5. Kitty Brewster
There were 107 positive cases in Blyth's Kitty Brewster ward where the rate is 1,648.
6. Berwick West with Ord
There were 68 positive cases in Berwick West with Ord where the rate is 1,629.
There were 74 positive cases in Blyth Isabella where the rate is 1,560.
8. Cramlington Eastfield
There were 78 positive cases in Cramlington Eastfield where the rate is 1,489.