| State: | CO |
| Type: | CO |
| Route: | 63 |
| Map: | Colorado State Highway 63 Map.svg |
| Map Notes: | Map of northeastern Colorado with SH 63 highlighted in red |
| Length Mi: | 56.4 |
| Length Round: | 1 |
| Length Ref: | [1] |
| Direction A: | South |
| Terminus A: | at Anton |
| Junction: | |
| Direction B: | North |
| Terminus B: | at Atwood |
| Counties: | Washington, Logan |
| Previous Type: | CO |
| Previous Route: | 62 |
| Next Type: | CO |
| Next Route: | 64 |
State Highway 63 (SH 63) is a 56.41NaN1 long state highway in northeastern Colorado. SH 63's southern terminus is at U.S. Route 36 (US 36) in Anton, and the northern terminus is at US 6 in Atwood.
SH 63 begins in the south at a junction with U.S. Highway 36 at Anton and proceeds north through remote, sparsely populated land for roughly 29miles before reaching a junction with U.S. Highway 34 at Akron. From there, the route continues north for a further 24miles to cross Interstate 76 at that highway's exit 115 and after roughly four more miles arrives at its northern terminus at U.S. Highway 6 in Atwood.
SH 63 was defined in the 1920s by the Colorado Department of Transportation, when it connected State Highway 96 in Haswell to Atwood at U.S. Highway 6. A gap appeared near Haswell in 1946. The section was later deleted by 1954, leaving its current routing from Anton to Atwood. This section was paved by 1961.[2]