The Ontario Road Network (ORN) is a province-wide geographic database of over 250,000 kilometers of municipal roads, provincial highways, and resource and recreation roads. The ORN is considered the authoritative source of roads data for Ontario.

The Historic Ontario Road Network (ORN) files provide time sensitive data and periodic updates to the ORN database.

Please note these files are superseded by more recent editions and are to be used with caution when interpreting data and results.

Supplementary data can be used and are available for download from the additional documentation section. Supplementary maps are available for download from the additional documentation section.