Law Enforcement Agencies in Silverbrook, DE DE › New Castle County Agencies serving the city of Silverbrook in DE. Agency Types in Silverbrook Municipal Police 1 agencies Parole Probation 1 agencies State Agency 1 agencies Youth Institutions 5 agencies All Agencies in Silverbrook, DE Elsmere Police Department New Castle County Ferris School New Castle County Grace Cottage New Castle County Mowlds Cottage New Castle County New Castle County Detention Center New Castle County Probation-Aftercare Services New Castle County Snowden Cottage New Castle County Youth Rehabilitative Services New Castle County
