The Division of Public Health on Wednesday announced the statewide total stands at 25.
There are 20 cases in New Castle County, three cases in Kent County and three cases in Sussex County.
Officials said they discovered new cases after New Castle County residents participated in the ChristianaCare Health System's drive-thru testing event on Friday, when 536 people were tested.
Schools in Delaware closed for two weeks
Delawareans with questions about COVID-19 or their exposure risk can call the Division of Public Health's Coronavirus Call Center at 1-866-408-1899, or 711 for individuals who are hearing impaired, from 8:30 a.m. to 8 p.m. Monday through Friday, and 10 a.m. to 4 p.m. Saturday and Sunday, or email DPHCall@delaware.gov.