Swedish county roads (Länsväg) are roads with road numbers from 100 and upwards in Sweden. The Swedish county roads are public roads maintained by the Swedish Transport Administration (Swedish: Trafikverket). There is a total of 82,873 km (51,495 mi) of county roads in Sweden.
The länsväg roads are divided into three categories:
- Primary county road (primär länsväg)
- Common number series in the range 100–499 throughout Sweden, and can stretch over county borders despite the name.
- Secondary county road (sekundär länsväg)
- Each county has its own number series in the range of 500–2999.
- Tertiary county road (tertiär länsväg)
- Each county has its own number series in the range of 3000–9999.
The primary county road number signs are rectangular with a blue background, white numbers, and a white border. The secondary and tertiary county roads are not signed along the roads, and they are prefixed with the county code of the county they are in.