Route 556, or Highway 556, may refer to:
| Preceded by 555 | Lists of highways 556 | Succeeded by 557 |
Secondary Highway 532, commonly referred to as Highway 532, is a provincially maintained secondary highway in the Canadian province of Ontario. The route connects several mining and milling towns in Unorganized Algoma District, notably Searchmont. The route is remote, ending at a mine access road 14.2 kilometres (8.8 mi) north of Highway 556, its southern terminus.
New Mexico State Road 556 (NM 556) is a 15.402-mile-long (24.787 km) state highway entirely within Bernalillo County, New Mexico. For most of its length, NM 556 is signed as Tramway Boulevard in Albuquerque, although from I-25 to its northern terminus at NM 47, NM 556 is signed as Roy Road. The highway's southern terminus is at an intersection with NM 333 and Historic U.S. Route 66, or Central Avenue. The highway then moves north intersecting with Interstate 40 (I-40). The highway is a divided four-lane road until its intersection with Tramway Road. After that, the highway narrows to two lanes and takes a westerly turn to intersect with I-25. The highway's northern terminus is at an intersection with NM 47.
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:
Mississippi Highway 556 is a state highway in southwestern Mississippi. The route starts at MS 184 in the town of Meadville and travels southeastwards. MS 556 crosses over the concurrency of U.S. Route 84 and US 98 inside the Homochitto National Forest, and the route ends at US 98 south of Bude. The route was designated around 1953, after a gravel road from US 84 to US 98, which had existed since 1928, was paved.
