The HSE has released the 14-day incidence rate of Covid-19 by electoral area for the first time.
The figures reveal a worrying trend for the Birr area which saw 23 cases of Covid-19 diagnosed in the first two weeks of September.
With a population in the Birr electoral area of 25,476, the incidence rate is 90.3 per 100,000, almost double the national average of 52.8.
Elsewhere in Offaly, Edenderry's 14-day incidence rate has dropped considerably to 42.9 per 100,000. 10 cases were diagnosed in the town and its environs, a population of 23,326, in the first two weeks of September.
The Tullamore Electoral Area had the lowest 14-day incidence rate in the county in the first two weeks of September. Just nine cases were confirmed among a population of 29,159 people, giving it a rate of 30.9, well below the national average.
There are fears this rate in Tullamore could grow after 20 people tested positive after staying in the Bridge House Hotel earlier this month.