List of state highways in Louisiana (650–699)

The following is a list of state highways in the U.S. state of Louisiana designated in the 650–699 range.

Louisiana Highway 650

Louisiana Highway 650 ran in a southeast to northwest direction between Gray and Schriever, Terrebonne Parish.
From the southeast, LA 650 began at an intersection with LA 316 at a point just east of Gray. It proceeded in a northerly direction along Bayou Blue Bypass Road. LA 650 briefly jogged to the east then back to the north, separating from Bayou Blue Bypass Road. It continued north along the Terrebonne - Lafourche Parish line to Martinez Road. Here it turned west onto Waterplant Road, skirting the southern boundary of Schriever. LA 650 entered Schriever then made a jog to the north and back to the west, proceeding to its terminus at LA 24.
LA 650 was an undivided two-lane highway for its entire length.

Louisiana Highway 651

Louisiana Highway 651 ran in a north–south direction along Bowie Road in Raceland, Lafourche Parish.
The route began at LA 308, which runs along Bayou Lafourche, and proceeded to a point on the Texas & New Orleans Railroad line where the community of Bowie was once located. It was an undivided, two-lane highway for its entire length. Now a ghost town, Bowie once thrived around a lumber mill served by the rail line north of Raceland in the early 20th century.
In the pre-1955 state highway system, LA 651 was designated as State Route 891. LA 651 was created with the 1955 Louisiana Highway renumbering and deleted from the state highway system in 1975.

Louisiana Highway 652

Louisiana Highway 652 runs in a north-south direction from a dead end at Bayou Cut Off to LA 182 in Raceland, Lafourche Parish.
The route initially heads west from a boat launch on Bayou Cut Off then turns north and crosses US 90 via an overpass. The freeway is accessed indirectly by the north service road. LA 652 zigzags west, then northwest along Bayou Folse, north across Bayou Cutoff, and finally northwest a short distance to an intersection with LA 182 just inside Raceland. LA 652 is an undivided two-lane highway for its entire length.

Louisiana Highway 653

Louisiana Highway 653 runs in a north-south direction from a local road south of Bayou Du Mar to LA 182 south of Raceland, Lafourche Parish.
The route heads north from an intersection with Eagle Island Road, a local road, and crosses Bayou Du Mar. It then crosses US 90 via an overpass. The freeway is accessed indirectly by the north service road. LA 653 continues north to an intersection with LA 182 south of Raceland. It is an undivided two-lane highway for its entire length.
Until recently, LA 653 extended west from its current southern terminus along what is now a private road to a second intersection with LA 182, existing as a loop off of that highway. In this form, LA 653 was part of the original route of the Old Spanish Trail, designated as State Route 2 in 1921 and US 90 in 1926. This route was bypassed in 1938 when US 90 was moved onto what is now LA 182. LA 182 was then bypassed by the current route of US 90 in 1977 and in 1999.

Louisiana Highway 654

Louisiana Highway 654 runs in an east-west direction from LA 1 in Mathews to the Company Canal bridge northwest of Gheens, Lafourche Parish.
The route heads northeast from LA 1 and immediately crosses a vertical lift bridge over Bayou Lafourche. It then intersects LA 308 which, like LA 1, follows alongside the bayou. later, LA 654 curves to the south and proceeds a short distance to a bridge at the Company Canal. A private road crosses the canal and proceeds toward the Golden Ranch Plantation in Gheens. LA 654 is an undivided two-lane highway for its entire length.

Louisiana Highway 655

Louisiana Highway 655 runs in an east–west direction from a local road in Lockport to LA 308 in Rita, Lafourche Parish.
The route begins at the intersection of Main and Vacherie Streets in Lockport. It immediately crosses a swing bridge across Bayou Lafourche into the unincorporated community of Rita. It then turns east and follows East Main Street to a junction with LA 308, the primary highway along the east bank of the bayou. LA 655 is an undivided two-lane highway for its entire length. A spur, in length and signed as the mainline route, follows Vacherie Street in Lockport from the bridge to LA 1.
LA 655 was formerly a loop that encompassed Main Street in Lockport, connecting with LA 1 on the east side of Lockport. The route also had a spur, signed as the mainline route, that consisted of an alternate connection to LA 1 along Vacherie Street in Lockport. This mileage was all transferred to local control in 2019 as part of La DOTD's Road Transfer Program.

Louisiana Highway 656

Louisiana Highway 656 ran in a west–east direction along Lake Long Drive near the Lafourche–Terrebonne Parish line northeast of Houma.
The route proceeded eastward from an intersection with LA 316 along the remains of Lake Long Bayou to a dead end west of the Company Canal and Lake Long. It was an undivided, two-lane highway for its entire length.
In the pre-1955 state highway system, LA 656 was designated as State Route C-1798. LA 656 was created with the 1955 Louisiana Highway renumbering and deleted in 1993.

Louisiana Highway 657

Louisiana Highway 657 runs in a north-south direction from LA 3235 in Larose to the end of state maintenance just north of Larose in Lafourche Parish.
The route heads northeast from LA 3235 and intersects LA 1, which follows the west bank of Bayou Lafourche. It proceeds immediately across a vertical lift bridge over the bayou and intersects LA 308. Here, LA 657 turns west alongside Bayou Lafourche while LA 308 continues straight ahead. Reaching the Gulf Intracoastal Waterway, LA 657 turns again to the northeast and crosses underneath LA 308. State maintenance ends just beyond Pump Station 7 Road, a local road. LA 657 is an undivided two-lane highway for its entire length.

Louisiana Highway 658

Louisiana Highway 658 ran in a west–east direction between two points along LA 20 in Schriever, Terrebonne Parish.
The route proceeded north from LA 20 along North Main Project Road, immediately crossing the Southern Pacific Railroad tracks. LA 658 then turned east onto Broadway Avenue, running parallel with the rail line, and continued to a point on the bypassed portion of LA 20 now known as Old Schriever Highway. It was an undivided, two-lane highway for its entire length.
In the pre-1955 state highway system, LA 658 was designated as State Route C-1982. LA 658 was created with the 1955 Louisiana Highway renumbering and deleted in 1973. LA 20 had been realigned onto a new railroad overpass about five years earlier, eliminating the at-grade crossing with the rail line and the direct connection between the two highways.

Louisiana Highway 659

Louisiana Highway 659 runs in an east-west direction from LA 24 in Houma to a second junction with LA 24 at Presquille, Terrebonne Parish.
The route heads east from LA 24, which changes from a divided four-lane highway flanking Bayou Terrebonne to an undivided two-lane highway running along the west bank of the bayou. LA 659 proceeds along the east bank and exits the city of Houma. After curving to the southeast, it intersects LA 3087. The highway continues southeast to Presquille and a second intersection with LA 24, which crosses to the east bank of the bayou. LA 659 is an undivided two-lane highway for its entire length.

Louisiana Highway 660

Louisiana Highway 660 runs in an east-west direction along Coteau Road from LA 24 in Gray to LA 316 northeast of Houma, Terrebonne Parish.
The route heads northeast from LA 24, which travels on either side of Bayou Terrebonne. It then curves to the southeast, running parallel to the limits of Bayou Cane and Houma. LA 660 intersects LA 182 and LA 3087, which connect Houma to eastbound US 90. The route ends at an intersection with LA 316 on the Terrebonne-Lafourche parish line. It is an undivided two-lane highway for its entire length.

Louisiana Highway 661

Louisiana Highway 661 runs in a north-south direction from LA 315 south of Houma to LA 24 in Houma, Terrebonne Parish.
The route heads northeast from an interchange with LA 315 and immediately crosses a swing bridge over the Houma Navigation Canal. It then crosses a vertical lift bridge over Bayou La Carpe and enters the city of Houma where it travels along South Van Avenue. In Houma, LA 661 intersects LA 57 and LA 3040. Crossing LA 3040, the highway curves to the north as Howard Avenue and proceeds to LA 24 at Bayou Terrebonne. A locally maintained vertical lift bridge crosses the bayou and connects to LA 659, which follows the opposite bank. LA 661 is an undivided two-lane highway for its entire length.

Louisiana Highway 662

Louisiana Highway 662 runs in a long loop off of US 90 and its former alignment, LA 182, with the western end extending down to the Intracoastal Waterway south of Boeuf.
LA 662 heads north on Oilfield Road through Boeuf and crosses underneath the Bayou Boeuf bridge on US 90 Bus./LA 182. It immediately turns east, briefly running alongside US 90 Bus./LA 182 before resuming its northern course, now in a concurrency with US 90 Bus. The concurrency ends at an interchange with Exit 182 on US 90, after which LA 662 proceeds north then curves northeast to Bayou L'Ourse, intersecting LA 663 and LA 398. The latter heads north to Labadieville, connecting LA 662 with the rest of Assumption Parish. LA 662 then curves back to the southeast, passing through a second interchange with US 90 at Exit 185 and terminating at LA 182 in an area known as Zacarter.
LA 662 is generally an undivided two-lane highway but widens to a divided four-lane highway in the vicinity of the two interchanges with US 90.