The following highways are numbered 804:
| Preceded by 803 | Lists of highways 804 | Succeeded by 805 |
The Autopista AP-68 is a Spanish autopista route. It connects Zaragoza with Bilbao via Tudela, Calahorra and Logroño. The entirety of the route forms the entirety of the European route E804, a B class road in the International E-road Network.
Tertiary Highway 804, commonly referred to as Highway 804, is a provincially maintained access road in the Canadian province of Ontario, located in Kenora District. The 21.4 kilometres (13.3 mi) route provides access to the Lower Manitou Falls Generating Station from Highway 105 near Ear Falls. Highway 804 was designated in 1962 and has remained unchanged since then.
King's Highway 109, or Highway 109, is a former provincial highway in Ontario. It was used on two separate, unrelated routes during the 1950s and 1960s:
Secondary Highway 500, commonly referred to as Highway 500, was a secondary highway in the Canadian province of Ontario which was first designated in 1956. Its route was renumbered in 1964, becoming:
Secondary Highway 514, commonly referred to as Highway 514, was a secondary highway in the Canadian province of Ontario. It was used on two separate routes from the 1950s to the 1990s:
