St. Mary Parish had a 2018 estimated population of 49,774. Facilities in this parish include: Berwick Town Jail, City of Morgan City Jail, and St. Mary Parish Law Enforcement Center. During data collection for inmate deaths between 2014-2019, the following facilities reported:
-City of Morgan City Jail: 2015: 1 death.
-St. Mary Parish Law Enforcement Center: did not report.