The map showing seven-day case rates across the UK included a darker purple to highlight those areas where with more than 1,600 new positive tests a week per 100,000 people.
Three Northampton neighbourhoods — Phippsville, Briar Hill & Hunsbury Hill and New Duston East — were the first to be designated in the town.
New Duston East had the highest rate of the three according to the latest complete figures with a rate of 1,705.9 per 100,000 after its number of weekly cases nearly doubled over Christmas.
Prime Minister Boris Johnson will lead a Downing Street briefing at 5pm on Tuesday (January 4).
Chris Hopson, chief executive of NHS Providers, said hospital admissions for coronavirus had increased by nine and 15 percent between December 27 and 29.
Latest official figures published on New Year's Eve showed 96 Covid patients were being treated in Northampton General Hospital and Kettering General Hospital by December 28.
Case rates in each neighbour are calucated by dividing the seven-day total of cases by the area's population and multiplying by 100,000. This makes it easier for analysts to compare cases across areas of different population size.
King's Heath & Spencer had the lowest case rate among the 31 Northampton neighbourhoods with 733.3 new positive tests per 100,000 people.