The attack rate ranged from 57%-82%, depending on the dormitory. Dormitory A had the lowest attack rate and the shortest interval from day of first RT-PCR confirmed case to day 1 of testing. 71 individuals (72%) in this study tested positive for SARS-CoV-2 after being quarantined due to initial exposure to an infected person. These findings suggest high transmission rates among incarcerated and congregated settings. The serial intervals for contacts of an infected person were successfully able to identify both asymptomatic and presymptomatic individuals who may have otherwise been missed from COVID-19 symptomatic assessments alone.