List of state highways in Louisiana
| Louisiana State Highways | |
|---|---|
.svg)  .svg)
State highway markers for different years: 1955 (left), 1990 (center), 2008 (right)
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| System information | |
| Length: | 16,698.41 mi (26,873.49 km) |
| Formed: | 1955 renumbering |
| Notes: | Since 2008, La DOTD has been replacing the green-and-white state highway markers with a black-and-white version using the same design. The new shields have a black background, white silhouette, black letters and numbers, and no frame outline (see photo below for comparison). |
| Highway names | |
| State: | Louisiana Highway X (LA X) |
| Bannered routes: | Louisiana Highway X Alternate (LA X ALT); Louisiana Highway X Business (LA X BUS); Louisiana Highway X Bypass (LA X BYP); Louisiana Highway X Spur (LA X SPUR); Louisiana Highway X Truck (LA X TRUCK) |
| System links | |
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Note: Year of deletion appears in parentheses.
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