| System Name | Type | City |
|---|---|---|
| Champion Communication (Mechanicsville) | LTR Standard | Mechanicsville |
| DMR-MARC Amateur Radio Network (MD) | DMR Conventional Networked | Various |
| First Responders Interoperable Radio System Team (FIRST) | Project 25 Phase II | Various |
| FleetTalk (DC-Area Connect Plus) | DMR Motorola Connect Plus (TRBO) | Various |
| Interstate Repeater System | DMR Conventional Networked | Various |
| Joint National Capital Region | Project 25 Phase I | Various |
| St. Mary's County | Project 25 Phase II | Various |
