In Sheffield, there were 66 new confirmed cases of Covid-19 during the week ending August 20, a rate of 11.3 per 100,000 people.
In Doncaster, there were just 10 confirmed cases during that period, equating to a rate of 3.2 per 100,000 population.
Rotherham saw 28 cases over the week, giving a rate of 10.6 per 100,000 people.
And in Barnsley, where 26 more people tested positive, the rate was 10.5 per 100,000 population.
The rate in Sheffield is nearly half what it was during the week ending August 11, when it stood at 22.2.
The weekly rate is calculated using the latest daily figures from Public Health England (PHE) as of today, Monday, August 24, but excluding data from the three most recent days (August 21-23) as it is incomplete and likely to be revised.
Despite the infection rate falling across South Yorkshire in recent days, Sheffield City Region mayor Dan Jarvis has warned that coronavirus ‘still poses a very real threat’, with the situation locally remaining ‘precarious’.
"We have just regained many aspects of normal life, but if cases rise beyond acceptable levels, we will have no alternative but to give them up once more,” he added.
The infection rate in South Yorkshire is considerably lower than other parts of England where localised restrictions have been introduced.
In Manchester, it stands at 41.4 new cases per 100,000 people, while in Oldham it is 62.8.