List of state highways in Louisiana (550–599)

Louisiana Highway 550 (LA 550) runs in a north–south direction from LA 2 east of Bernice to the Arkansas state line north of Laran, Union Parish. The route heads northeast from LA 2 and intersects LA 15 southeast of Spearsville. LA 550 then curves northward and passes through Laran before crossing the Arkansas state line. The road continues toward Hillsboro, Arkansas and US 82 as Union County Road 32. It is an undivided two-lane highway for its entire length. ==Louisiana Highway 551==

Louisiana Highway 551 (LA 551) runs in a north–south direction from LA 33 in Marion to LA 549 in Oakland, Union Parish. The route heads northwest out of Marion, traversing a rural area and skirting the northeast side of the Union Wildlife Management Area. Its northern terminus at LA 549 is located south of the Arkansas state line. LA 551 is an undivided two-lane highway for its entire length. ==Louisiana Highway 552==

Louisiana Highway 552 (LA 552) runs in Union Parish. ==Louisiana Highway 553==

Louisiana Highway 553 (LA 553) runs in a north–south direction from US 165 in Monroe to LA 2 in Sterlington, Ouachita Parish. ==Louisiana Highway 554==

Louisiana Highway 554 (LA 554) runs in an east–west direction from a junction with US 165 and LA 2 at Perryville to LA 138 southwest of Collinston. The western terminus at US 165 and LA 2 is located on the Ouachita–Morehouse parish line. From this point, the route heads eastward through Ouachita Parish for before crossing Little Bayou Boeuf into Morehouse Parish. LA 554 intersects LA 139, which connects to Monroe and Bastrop. It continues eastward then makes a sharp curve to the south near its eastern terminus at LA 138. LA 554 is an undivided two-lane highway for its entire length. ==Louisiana Highway 555==

Louisiana Highway 555 (LA 555) runs in Franklin Parish. ==Louisiana Highway 556==

Louisiana Highway 556 (LA 556) runs from Choudrant to Indian Village. ==Louisiana Highway 557==

Louisiana Highway 557 (LA 557) runs from Vixen to Summit. ==Louisiana Highway 558==

Louisiana Highway 558 (LA 558) runs in a north–south direction along Iron Mountain Road from LA 15 in Mount Union to the Arkansas state line at Lockhart, Union Parish. The route heads north from LA 15 at a point about east of Spearsville. Just before crossing the state line, LA 558 intersects LA 3121 in Lockhart. It continues toward El Dorado, Arkansas and US 167 as Arkansas Highway 7. LA 558 is an undivided two-lane highway for its entire length. ==Louisiana Highway 559==

Louisiana Highway 559 (LA 559) runs from Enterprise to Columbia. ==Louisiana Highway 560==

Louisiana Highway 560 (LA 560) is a collection of two current and two former state-maintained streets in Marrero and Crown Point, Jefferson Parish. All four routes were established with the 1955 Louisiana Highway renumbering. ==Louisiana Highway 561==

Louisiana Highway 561 (LA 561) runs from Hebert to Richland Parish. ==Louisiana Highway 562==

Louisiana Highway 562 (LA 562) runs from Fort Necessity to Wisner. ==Louisiana Highway 563==

Louisiana Highway 563 (LA 563) runs in Simsboro. ==Louisiana Highway 564==

Louisiana Highway 564 (LA 564) runs in Catahoula Parish. ==Louisiana Highway 565==

Louisiana Highway 565 (LA 565) runs from Wildsville to Deer Park. ==Louisiana Highway 566==

Louisiana Highway 566 (LA 566) runs in a southwest to northeast direction from US 84 at Elkhorn, Concordia Parish to a junction with LA 568 and LA 570 south of Waterproof, Tensas Parish. The route heads northward from US 84 and follows Brushy Bayou for about . It then curves slightly northeast to a point on the Tensas River known as Dunbarton. LA 566 turns east and roughly follows the river into the town of Clayton. Here, it intersects the concurrent US 425 and LA 15 at the foot of a twin bridge across the Tensas River. LA 566 curves to the north with the river and crosses from Concordia Parish into Tensas Parish. Soon after crossing the parish line, LA 566 intersects LA 571, the route of which follows a semi-circle west of Waterproof. LA 566 turns to the southeast at a second intersection with LA 571 and passes through Troy to a point on US 65 and LA 568 just southwest of Waterproof. LA 566 officially proceeds with LA 568 a short distance further to an intersection with LA 570, but this portion of the route is signed in the field only as LA 568. ==Louisiana Highway 567==

Louisiana Highway 567 (LA 567) runs in Lee Bayou. ==Louisiana Highway 568==

Louisiana Highway 568 (LA 568) runs from Ferriday to Avondale. ==Louisiana Highway 569==

Louisiana Highway 569 (LA 569) runs from Spokane to Lake St. John. ==Louisiana Highway 570==