List of county routes in Suffolk County, New York (1–25)
| Highway names | |
|---|---|
| Interstates | Interstate X (I-X) |
| US Highways | U.S. Route X (US X) |
| State | New York State Route X (NY X) |
| County: | County Route X (CR X) |
| System links | |
County routes in Suffolk County, New York, are maintained by the Suffolk County Department of Public Works and signed with the Manual on Uniform Traffic Control Devices-standard yellow-on-blue pentagon route marker. The designations do not follow any fixed pattern. Routes 1 to 25 are listed below.