The following highways are numbered 806:
| Preceded by 805 | Lists of highways 806 | Succeeded by 807 |
State Road 806 (SR 806), locally known as Atlantic Avenue, is the primary east–west highway of Delray Beach in Palm Beach County, Florida. Not to be confused with parallel Atlantic Boulevard (SR 814) 15 miles (24.14 km) to the south, Atlantic Avenue extends from U.S. Route 441 (US 441) and SR 7 eastward to SR A1A just north of Highland Beach. East of Military Trail, SR 806 is in the city of Delray Beach; to the west of Military Trail, the road stretches through unincorporated Palm Beach County in the CDPs of High Point, Kings Point, and the Villages of Oriole.
Maryland Route 806 is a state highway in the U.S. state of Maryland. The state highway runs a total of 4.05 miles (6.52 km) in two segments from U.S. Route 15 near Catoctin Furnace north to Roddy Creek Road near Thurmont. MD 806A, which has a length of 3.04 miles (4.89 km) from Catoctin Furnace to Thurmont, and MD 806R, which extends 0.55 miles (0.89 km) on the north side of Thurmont, are separated by a section of municipally-maintained road on the south side of Thurmont and a segment of MD 550 north of MD 77. MD 806 is the old alignment of US 15 through Catoctin Furnace and Thurmont. The state highway was originally constructed in the 1910s. MD 806 was assigned to the highway when US 15 bypassed Thurmont in the late 1950s. The state highway became a split route in the late 1980s. There have been several other segments of MD 806 along former sections of US 15 in Frederick County, including portions around Lewistown and south of Frederick.
Alberta Provincial Highway No. 806, commonly referred to as Highway 806, is a north–south highway in central Alberta, Canada. It runs from the Highway 9 / Highway 72 junction in the Village of Beiseker, through the Villages of Acme and Linden, to Highway 583 located 16 km (10 mi) west of the Town of Three Hills.
State Route 806 is a short state highway in Lander County, Nevada connecting the town of Battle Mountain to North Battle Mountain. Prior to 1976, the route was part of a longer State Route 18A.
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 545, commonly referred to as Highway 545, was a provincially maintained secondary highway in the Canadian province of Ontario. This 33.9-kilometre (21.1 mi) highway connected Highway 541 at Bailey Corners near Garson with the now-abandoned community of Milnet, passing through Hanmer and Capreol. It followed what is now Municipal Road 85, Municipal Road 84, and Milnet Road. The route featured a concurrency with Highway 69 between Hanmer and Capreol.
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:
