By their nature, all county roads in Ontario are numbered, unless noted. This page lists all of the county/district/regional roads by their respective county, district, or regional municipality.
Some counties have been merged in the past, and are known as "United Counties". They will be treated and named as one county.
The county road network has been present for many years, but has only been signed with the flowerpot logos since the early 1970s or 1980s (depending on the area). Previously, the roads simply had road names, such as "Essex Road 42" or "Kent County Road 14", and so on, but had no shields to designate them.
CH = County Highway - some counties have the same number designation for two or more County Routes, but some (like Durham RM and the City of Norfolk County) also list routes as County Highways (CR HWY/RR HWY/DR HWY), abbreviated as CH. These are designations for downloaded former provincial highways. A prime example is Durham RR 2, and Durham RR HWY 2.