List of county routes in Rensselaer County, New York

County routes in Rensselaer County, New York, are maintained by the Rensselaer County Highway Department and signed with the Manual on Uniform Traffic Control Devices-standard yellow-on-blue pentagon route marker. Routes generally do not enter cities or incorporated villages, except for CRs 117 & 118 in Valley Falls. County route numbers are assigned in clusters by town, with the number indicating the town that most of the route lies within:
 * 1–9: Schodack
 * 15–21: Nassau
 * 23–33: Stephentown
 * 36–42: Berlin
 * 43–44: Poestenkill
 * 45–53: Sand Lake
 * 54–63: East Greenbush
 * 65–76: North Greenbush
 * 79–88: Grafton
 * 90–98: Petersburgh
 * 100–105: Hoosick
 * 109–115, 117–118 and 123: Pittstown
 * 116, 119–122 and 124–127: Schaghticoke
 * 128–145: Brunswick

Each route entry below contains a link to its relation in OpenStreetMap (OSM).