Gateway has been a valued provider of community-based treatment services in Delaware since 2004. Gateway has since expanded their services to provide Cognitive Behavioral Therapy within the Department of Correction and in 2019 added assessment and SUD intervention services in all four probation and parole offices located throughout the state.

= Male In-Custody CBT Treatment Probation and Parole Assessment and SUD Intervention Centers
= Female
Howard R. Young Correctional Institution
41302 E. 12th St.
Wilmington, DE 19802
James T. Vaughn Correctional Institution
1181 Paddock Rd.
Smyrna, DE 19977
New Castle County (Hare's Corner) Probation and Parole
26 Parkway Circle
New Castle, DE
New Castle County (Cherry Lane) Probation and Parole
314 Cherry Lane
New Castle, DE 19720
Baylor Women's Correctional Institution
660 Baylor Blvd
New Castle, DE 19720
Sussex Correctional Institution
23203 Dupont Blvd
Georgetown, DE 19947
Sussex County Probation and Parole
22855 Dupont Blvd
Georgetown, DE 19947
Sussex Community Center
23207 Dupont Blvd
Georgetown, DE, 19947
Plummer Community Corrections Center
38 Todds Lane
Wilmington, DE 19802
Hazel D. Plant
620 Baylor Blvd
New Castle, DE 19720
Kent County Probation and Parole
511 Maple Pkwy
Dover, DE 19901