On Monday, the Department of Health-Marion County said in a news release of the nearly 350 new positive cases, 202 were from correctional facilities.
Additionally, 952 inmates at Lowell Correctional, 577 at FWRC and 122 at Marion Correctional are under medical quarantine.
Staff members at all three facilities have tested positive as well, including 20 at Lowell, 22 at FWRC and 5 at Marion Correctional.
As of Tuesday, 3,228 people have tested positive for COVID-19 in Marion County since March, including 51 who have died as a result of the virus.
None of the deaths have been connected to the correctional facilities, according to the Department of Health.