# List of state highways in Louisiana (400–449)

The following is a list of state highways in the U.S. state of Louisiana designated in the 400-449 range.

## Louisiana Highway 400

Louisiana Highway 400 (LA 400) runs 5.75 miles (9.25 km) in an east–west direction from a local road northeast of Attakapas Landing to LA 1 north of Supreme, Assumption Parish.
From the west, LA 400 begins at the east end of a bridge across the Cancienne Canal. It continues the path of a local road that begins at a junction with LA 401 just north of Attakapas Landing on Lake Verret. LA 400 heads eastward and intersects LA 1011 and LA 1010 before ending at a junction with LA 1 opposite Bayou Lafourche. LA 400 is an undivided two-lane highway for its entire length.
The entire highway is in Assumption Parish.
| Location | mi | km | Destinations | Notes |
| ​ | 0.000 | 0.000 | Begin state maintenance at Cancienne Canal bridge | Western terminus |
| ​ | 1.737 | 2.795 | LA 1011 | Western terminus of LA 1011 |
| Percle | 4.218 | 6.788 | LA 1010 | |
| ​ | 5.746 | 9.247 | LA 1 – Napoleonville, Thibodaux | Eastern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## Louisiana Highway 401

Louisiana Highway 401 (LA 401) runs 9.41 miles (15.14 km) in a southwest to northeast direction from a dead end at Lake Verret in Attakapas Landing to a junction with LA 1 in Napoleonville, Assumption Parish. The route's mileposts increase from the eastern end contrary to common practice.
The entire highway is in Assumption Parish.
| Location | mi | km | Destinations | Notes |
| Attakapas Landing | 9.407 | 15.139 | Dead end at Lake Verret | Western terminus |
| ​ | 1.937 | 3.117 | LA 1006 | Southern terminus of LA 1006 |
| Napoleonville | 0.000 | 0.000 | LA 1 – Donaldsonville, Thibodaux | Eastern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## Louisiana Highway 402

Louisiana Highway 402 (LA 402) runs 5.07 miles (8.16 km) in an east–west direction from a local road west of Brusle St. Vincent to LA 308 north of Napoleonville, Assumption Parish. The route's mileposts increase from the eastern end contrary to common practice.
The entire highway is in Assumption Parish.
| Location | mi | km | Destinations | Notes |
| ​ | 5.070 | 8.159 | Begin state maintenance | Western terminus |
| Brusle St. Vincent | 2.530 | 4.072 | LA 403 | Southern terminus of LA 403 |
| ​ | 1.452 | 2.337 | LA 1006 | Northern terminus of LA 1006 |
| Munsons | 0.068 | 0.109 | LA 1 – Napoleonville, Donaldsonville | |
| ​ | 0.017– 0.053 | 0.027– 0.085 | Bridge over Bayou Lafourche | Bridge over Bayou Lafourche |
| ​ | 0.000 | 0.000 | LA 308 – Napoleonville, Donaldsonville | Eastern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## Louisiana Highway 403

Louisiana Highway 403 (LA 403) runs 2.88 miles (4.63 km) in a north–south direction from LA 402 at Brusle St. Vincent to LA 308 at Paincourtville, Assumption Parish.
The entire highway is in Assumption Parish.
| Location | mi | km | Destinations | Notes |
| Brusle St. Vincent | 0.000 | 0.000 | LA 402 | Southern terminus |
| ​ | 0.552 | 0.888 | LA 1004 | Southern terminus of LA 1004 |
| Paincourtville | 2.800 | 4.506 | LA 1 – Donaldsonville, Napoleonville | |
| Paincourtville | 2.807– 2.853 | 4.517– 4.591 | Bridge over Bayou Lafourche | Bridge over Bayou Lafourche |
| Paincourtville | 2.878 | 4.632 | LA 308 – Donaldsonville, Napoleonville | Northern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## Louisiana Highway 404

Louisiana Highway 404 (LA 404) runs 8.23 miles (13.24 km) in an east–west direction from LA 75 at Choctaw to LA 69 at Samstown, Iberville Parish. The route's mileposts increase from the eastern end contrary to common practice.
The entire highway is in Iberville Parish.
| Location | mi | km | Destinations | Notes |
| Choctaw | 8.230 | 13.245 | LA 75 – Bayou Pigeon, Bayou Sorrel | Western terminus |
| ​ | 2.000 | 3.219 | LA 993 (Richland Road) | |
| ​ | 1.577 | 2.538 | LA 3001 | Eastern terminus of LA 3001 |
| Samstown | 0.000 | 0.000 | LA 69 – White Castle, Grand Bayou | Eastern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## Louisiana Highway 405

Louisiana Highway 405 (LA 405) runs 29.35 miles (47.23 km) in a general north–south direction from LA 1 west of Donaldsonville, Ascension Parish to the junction of LA 1 and LA 75 in Plaquemine, Iberville Parish.
| Parish | Location | mi | km | Destinations | Notes |
| Ascension | McCall | 0.000 | 0.000 | LA 1 – Donaldsonville, White Castle | Southern terminus |
| Iberville | ​ | 12.436– 12.567 | 20.014– 20.225 | LA 3075 | Southern terminus of LA 3075 (not signed) |
| Iberville | White Castle | 14.313 | 23.035 | LA 69 south (Bowie Street) | South end of LA 69 concurrency |
| Iberville | ​ | 14.796 | 23.812 | LA 993 (Richland Road) | Northern terminus of LA 993 |
| Iberville | Bayou Goula | 17.358 | 27.935 | LA 69 north (Augusta Road) | North end of LA 69 concurrency |
| Iberville | Plaquemine | 29.185 | 46.969 | LA 75 east – Plaquemine Ferry | South end of LA 75 concurrency |
| Iberville | Plaquemine | 29.250– 29.346 | 47.073– 47.228 | LA 1 (Church Street, Eden Street) LA 75 west (Belleview Road) | Northern terminus; north end of LA 75 concurrency; one-way couplet on LA 1 |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus ||||||

## Louisiana Highway 406

Louisiana Highway 406 (LA 406) runs 6.00 miles (9.66 km) in a north–south direction from LA 23 in Belle Chasse, Plaquemines Parish to the junction of two local roads in New Orleans, Orleans Parish. It provides access to the Woodland Bridge across the Gulf Intracoastal Waterway for Belle Chasse and an area of New Orleans known as the Algiers Lower Coast.
LA 406 heads north from LA 23 (Belle Chasse Highway) in Belle Chasse. Traveling along Woodland Highway, the route passes a series of newer residential subdivisions. The roadway curves to the northeast, traversing a corner of Orleans Parish, and passes a small cluster of industrial facilities located alongside the Gulf Intracoastal Waterway. LA 406 proceeds straight ahead and crosses from Plaquemines Parish again into Orleans Parish, simultaneously re-entering the New Orleans city limits. After crossing underneath the Woodland Bridge, LA 406 engages in a roundabout with LA 407, which loops around onto the bridge and across the waterway. The highway then passes the entrance to the upscale English Turn residential community and country club. LA 406 curves due east onto Patterson Drive (also known as River Road) along the Mississippi River levee and proceeds to an intersection with Stanton Road. River Road continues as a local road until reaching the U.S. Coast Guard station three miles (4.8 km) later.
| Parish | Location | mi | km | Destinations | Notes |
| Plaquemines | Belle Chasse | 0.000– 0.077 | 0.000– 0.124 | LA 23 (Belle Chasse Highway) | Southern terminus |
| Orleans | No major junctions | No major junctions | No major junctions | No major junctions | No major junctions |
| Plaquemines | No major junctions | No major junctions | No major junctions | No major junctions | No major junctions |
| Orleans | New Orleans | 3.226– 3.372 | 5.192– 5.427 | LA 407 north (Woodland Bridge) – New Orleans | Southern terminus of LA 407; roundabout |
| Orleans | New Orleans | 6.002 | 9.659 | River Road / Stanton Road | Northern terminus; location also known as Stanton |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi ||||||

## Louisiana Highway 407

Louisiana Highway 407 (LA 407) runs 2.56 miles (4.12 km) in a north–south direction from LA 406 to LA 428 in New Orleans, Orleans Parish. The route connects General de Gaulle Drive, a major thoroughfare through the Algiers area of the city, with LA 406 via the Woodland Bridge across the Gulf Intracoastal Waterway.
LA 407 begins at a roundabout junction with LA 406 (Woodland Highway) near the English Turn residential subdivision in the Lower Coast Algiers area of New Orleans. The divided four-lane highway loops to the north and proceeds across the high-level Woodland Bridge over the Gulf Intracoastal Waterway, located along the Orleans–Plaquemines parish line. Returning to grade, LA 407 intersects General de Gaulle Drive, which continues ahead through Algiers toward the Crescent City Connection bridge spanning the Mississippi River in Downtown New Orleans. LA 407 turns north from this junction onto Woodland Drive and narrows to an undivided four-lane highway. The route continues in this capacity through the residential Old Aurora neighborhood until reaching an intersection with LA 428 (General Meyer Avenue).
| Parish | Location | mi | km | Destinations | Notes |
| Orleans | New Orleans | 0.000– 0.078 | 0.000– 0.126 | LA 406 (Woodland Highway) – English Turn, Belle Chasse | Southern terminus; roundabout |
| Orleans–Plaquemines parish line | New Orleans–Belle Chasse line | 0.212– 1.151 | 0.341– 1.852 | Woodland Bridge over Gulf Intracoastal Waterway | Woodland Bridge over Gulf Intracoastal Waterway |
| Orleans | New Orleans | 1.286– 1.321 | 2.070– 2.126 | General de Gaulle Drive – Mississippi River Bridge | |
| Orleans | New Orleans | 2.556 | 4.113 | LA 428 (General Meyer Avenue) | Northern terminus of LA 407; eastern terminus of LA 428 |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi ||||||

## Louisiana Highway 408

Louisiana Highway 408 (LA 408) runs 12.28 miles (19.76 km) in an east–west direction from a local road in Baton Rouge to a junction with the concurrent LA 37/LA 64 in Central, East Baton Rouge Parish. The route connects northern Baton Rouge with Greenwell Springs, a rural community within the Central city limits.
LA 408 begins on Harding Boulevard at the west end of the Canadian National Railway/Kansas City Southern Railway overpass alongside the Southern University campus. This terminus is located in an area within the Baton Rouge city limits known as Scotlandville. LA 408 heads east across the overpass as a divided four-lane highway and intersects US 61 (Scenic Highway). Several blocks later, the highway passes through an interchange with I-110 at exit 6, connecting to Downtown Baton Rouge and Natchez, Mississippi. Jutting out from this junction is Veterans Memorial Boulevard, a local road that provides access to Baton Rouge Metropolitan Airport. After passing along the south side of the airport, LA 408 crosses LA 67 (Plank Road), and the local name changes from Harding Boulevard to Hooper Road. 3.2 miles (5.1 km) after exiting the Baton Rouge city limits, LA 408 crosses the Comite River into the suburban city of Central. Over the next 3.3 miles (5.3 km) are junctions with LA 410 (Blackwater Road), LA 946 (Joor Road), and LA 3034 (Sullivan Road). During this stretch, LA 408 narrows to an undivided two-lane highway. It continues northeast in this capacity until reaching a junction with LA 37/LA 64 (Greenwell Springs Road), which parallels the Amite River.
The entire highway is in East Baton Rouge Parish.
| Location | mi | km | Destinations | Notes |
| Baton Rouge | 0.000 | 0.000 | Begin state maintenance on Harding Boulevard at CN/KCS railroad overpass | Western terminus |
| Baton Rouge | 0.280– 0.359 | 0.451– 0.578 | US 61 (Scenic Highway) – Baton Rouge, Natchez | Location also known as Scotlandville |
| Baton Rouge | 1.219– 1.489 | 1.962– 2.396 | I-110 – Baton Rouge, Natchez Veterans Memorial Boulevard – Metro Airport | Exit 6 on I-110 |
| Baton Rouge | 2.335– 2.376 | 3.758– 3.824 | LA 67 (Plank Road) | Location also known as Howell |
| Central | 5.538– 5.600 | 8.913– 9.012 | Bridge over Comite River | Bridge over Comite River |
| Central | 6.028 | 9.701 | LA 410 (Blackwater Road) | Southern terminus of LA 410 |
| Central | 8.238 | 13.258 | LA 946 (Joor Road) | Northern terminus of LA 946 |
| Central | 9.346 | 15.041 | LA 3034 (Sullivan Road) | Western terminus of LA 3034 |
| Central | 12.281 | 19.764 | LA 37 / LA 64 (Greenwell Springs Road) | Eastern terminus; location also known as Greenwell Springs |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## Louisiana Highway 409

Louisiana Highway 409 (LA 409) runs 11.26 miles (18.12 km) in a north–south direction from LA 64 in Central, East Baton Rouge Parish to LA 959 at Blairstown, East Feliciana Parish.
LA 409 heads north on Liberty Road from a T-intersection with LA 64 in area within the Central city limits known as Indian Mound. The highway travels about 6.7 miles (10.8 km) to the community of Pride, where it curves east onto Pride-Baywood Road then turns north onto Riley Road. North of Pride, LA 409 crosses from East Baton Rouge Parish into East Feliciana Parish and proceeds to a junction with LA 959 at Blairstown. LA 409 is an undivided two-lane highway for its entire length. As of 2018, the portion in East Baton Rouge Parish (except for the portion south of Bethel Church) is under agreement to be removed from the state highway system and transferred to local control.
| Parish | Location | mi | km | Destinations | Notes |
| East Baton Rouge | Central | 0.000 | 0.000 | LA 64 (Liberty Road, Greenwell Springs-Port Hudson Road) – Greenwell Springs, Zachary | Southern terminus |
| East Feliciana | Blairstown | 11.256 | 18.115 | LA 959 – Blairstown, Bluff Creek | Northern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi ||||||

## Louisiana Highway 410

Louisiana Highway 410 (LA 410) runs 8.18 miles (13.16 km) in a north–south direction along Blackwater Road from LA 408 to LA 64 in Central, East Baton Rouge Parish.
The entire highway is in Central, East Baton Rouge Parish.
| mi | km | Destinations | Notes |
| 0.000 | 0.000 | LA 408 (Hooper Road) | Southern terminus |
| 8.176 | 13.158 | LA 64 (Greenwell Springs-Port Hudson Road) | Northern terminus; location also known as Deerford |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi ||||

## Louisiana Highway 411

Louisiana Highway 411 (LA 411) runs 11.52 miles (18.54 km) in a north–south direction from LA 76 in Rosedale, Iberville Parish to the junction of US 190 and LA 78 in Livonia, Pointe Coupee Parish. The route's mileposts increase from the northern end contrary to common practice.
LA 411 heads northwest from LA 76 in Rosedale alongside the east bank of Bayou Grosse Tete. After about six miles (9.7 km), the route passes along the eastern edge of Maringouin, which is accessed by bridge via LA 977. Shortly afterward, the highway crosses from Iberville Parish into Pointe Coupee Parish. LA 411 continues along the bayou until reaching a junction with US 190 (Airline Highway) in Livonia, connecting with the cities of Baton Rouge and Opelousas. LA 78 continues the path of the roadway northward toward New Roads. LA 411 is an undivided two-lane highway for its entire length.
| Parish | Location | mi | km | Destinations | Notes |
| Iberville | Rosedale | 11.515 | 18.532 | LA 76 (Rosedale Road) – Ramah, Port Allen | Southern terminus |
| Iberville | ​ | 5.564 | 8.954 | LA 977 north – Maringouin | Southern terminus of LA 977 |
| Pointe Coupee | Livonia | 0.000 | 0.000 | US 190 (Airline Highway) – Baton Rouge, Opelousas LA 78 north – New Roads | Northern terminus of LA 411; southern terminus of LA 78 |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi ||||||

## Louisiana Highway 412

Louisiana Highway 412 (LA 412) runs 9.94 miles (16.00 km) in an east–west direction from LA 964 west of Slaughter to LA 67 east of Slaughter, East Feliciana Parish.
The entire highway is in East Feliciana Parish.
| Location | mi | km | Destinations | Notes |
| ​ | 0.000 | 0.000 | LA 964 (Old Scenic Highway) LA 955 | Western terminus of LA 412; southern terminus of LA 955; west end of LA 955 concurrency |
| ​ | 0.407 | 0.655 | LA 955 north | East end of LA 955 concurrency |
| Slaughter | 5.100 | 8.208 | LA 19 – Zachary, Wilson | |
| ​ | 7.498 | 12.067 | LA 956 | Southern terminus of LA 956 |
| ​ | 8.635 | 13.897 | LA 957 | Southern terminus of LA 957 |
| Olive Branch | 9.938 | 15.994 | LA 67 – Zachary, Clinton | Eastern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus |||||

## Louisiana Highway 413

Louisiana Highway 413 (LA 413) runs 23.74 miles (38.21 km) in a north–south direction from LA 76 south of Erwinville, West Baton Rouge Parish to LA 1 Bus. in New Roads, Pointe Coupee Parish.
Prior to the 1955 highway number redesignations, the current LA Highway 413 ran along road beds that were parts of LA State Route 73, LA State Route 139, and LA State Route 135 of the old numbering system. The portion of the highway from Rosedale Road that runs north to near False River was the old LA State Route 73 portion. The portion that runs along False River and carries the local name "Island Road" was the old LA State Route 139 portion. The portion of the current highway that runs east-west from near Patin Dyke to New Roads was the old LA State Route 135 portion.
LA 413 heads north on Poydras Bayou Drive from LA 76 (Rosedale Road) in West Baton Rouge Parish. It crosses the concurrent US 190/LA 1 (Airline Highway) in Erwinville. The highway then skirts the Pointe Coupee Parish line for a short time before crossing it at a junction with LA 3091 (Flynn Road). LA 413 makes a brief zigzag onto LA 416 in Lakeland. Shortly afterward, the route turns west at an intersection with LA 414 (Island Road) and makes a long loop alongside False River through Jarreau and Dupont to Ventress. Here, LA 413 meets LA 414 (Ventress Road) a second time and turns north briefly to a junction with LA 415 (Patin Dyke Road) at Patin. The highway turns west once again and enters the city of New Roads, where it terminates at a junction with LA 1 Bus. at the corner of Main and New Roads Streets. LA 413 is an undivided two-lane highway for its entire length.
| Parish | Location | mi | km | Destinations | Notes |
| West Baton Rouge | ​ | 0.000 | 0.000 | LA 76 (Rosedale Road) to I-10 – Rosedale, Port Allen | Southern terminus |
| West Baton Rouge | Erwinville | 4.243 | 6.828 | US 190 / LA 1 (Airline Highway) – Baton Rouge, Opelousas | |
| West Baton Rouge | ​ | 4.723 | 7.601 | LA 620 (Section Road) | Western terminus of LA 620 |
| West Baton Rouge–Pointe Coupee parish line | ​ | 6.832 | 10.995 | LA 3091 (Flynn Road) | Northern terminus of LA 3091 |
| Pointe Coupee | Lakeland | 9.038 | 14.545 | LA 416 east – Rougon | South end of LA 416 concurrency |
| Pointe Coupee | Lakeland | 9.248 | 14.883 | LA 416 west – Lakeland | North end of LA 416 concurrency |
| Pointe Coupee | ​ | 9.753 | 15.696 | LA 414 (Island Road) | Southern terminus of LA 414 |
| Pointe Coupee | Ventress | 21.515 | 34.625 | LA 414 (Ventress Road) | Northern terminus of LA 414 |
| Pointe Coupee | Patin | 22.116 | 35.592 | LA 415 (Patin Dyke Road) | Northern terminus of LA 415 |
| Pointe Coupee | New Roads | 23.741 | 38.207 | LA 1 Bus. (Main Street, New Roads Street) | Northern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus ||||||

## Louisiana Highway 414

Louisiana Highway 414 (LA 414) runs 10.55 miles (16.98 km) in a general north–south direction from LA 413 north of Lakeland to a second junction with LA 413 at Ventress, Pointe Coupee Parish. The route travels in a loop off of LA 413 around an area between the False River and Mississippi River known as "The Island".
LA 414 heads northeast from LA 413 through Chenal and across the Kansas City Southern Railway line to a junction with LA 415 (River Road) at the Mississippi River levee. The route turns north alongside the levee and travels concurrent with LA 415 for 2.2 miles (3.5 km). LA 414 then turns west and proceeds back across the KCS rail line to its terminus at LA 414 in Ventress. It is an undivided two-lane highway for its entire length.
The entire highway is in Pointe Coupee Parish.
| Location | mi | km | Destinations | Notes |
| ​ | 0.000 | 0.000 | LA 413 (Island Road, Zach Road) – Lakeland | Southern terminus |
| Chenal | 1.192 | 1.918 | LA 983 – Rougon | Northern terminus of LA 983 |
| ​ | 4.918 | 7.915 | LA 415 south (River Road) | South end of LA 415 concurrency |
| ​ | 7.128 | 11.471 | LA 415 north (River Road) | North end of LA 415 concurrency |
| Ventress | 10.550 | 16.979 | LA 413 (Island Drive, Legion Drive) – New Roads | Northern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus |||||

## Louisiana Highway 415

Louisiana Highway 415 (LA 415) runs 25.80 miles (41.52 km) in a north–south direction from I-10 west of Port Allen, West Baton Rouge Parish to LA 413 east of New Roads, Pointe Coupee Parish. The route has a spur that travels 0.48 miles (0.77 km), providing a connection to westbound US 190/LA 1 at Lobdell.

## Louisiana Highway 416

Louisiana Highway 416 (LA 416) runs 7.25 miles (11.67 km) in an east–west direction from LA 1 at Knapp to LA 415 at Hermitage, Pointe Coupee Parish. The route's mileposts increase from the eastern end contrary to common practice.
LA 416 heads east from LA 1 through Lakeland, where it intersects LA 413. The road curves northeast through Rougon and briefly overlaps LA 983. At Glynn, LA 416 crosses the Kansas City Southern Railway (KCS) tracks at grade and intersects LA 982. The route continues northeast to a junction with LA 415 in Hermitage at the west bank levee of the Mississippi River. LA 416 is an undivided two-lane highway for its entire length.
The entire highway is in Pointe Coupee Parish.
| Location | mi | km | Destinations | Notes |
| Knapp | 7.247– 7.167 | 11.663– 11.534 | LA 1 (Wye Road) – New Roads | Western terminus |
| Lakeland | 5.399 | 8.689 | LA 413 north (Zach Road) | West end of LA 413 concurrency |
| Lakeland | 5.199 | 8.367 | LA 413 south (Poydras Bayou Road) | East end of LA 413 concurrency |
| ​ | 4.445 | 7.154 | LA 983 south | West end of LA 983 concurrency |
| Rougon | 3.803 | 6.120 | LA 983 north | East end of LA 983 concurrency |
| Glynn | 2.035 | 3.275 | LA 982 (Arbroth Road) | Western terminus of LA 982 |
| Hermitage | 0.000 | 0.000 | LA 415 (River Road) | Eastern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus |||||

## Louisiana Highway 417

Louisiana Highway 417 (LA 417) runs 24.28 miles (39.07 km) in a north–south direction from LA 10 at Red Cross to LA 418 at Legonier, Pointe Coupee Parish. It exists in two sections, as part of the route between Red Cross and Coon is under local control.
The entire highway is in Pointe Coupee Parish.
| Location | mi | km | Destinations | Notes |
| Red Cross | 0.000 | 0.000 | LA 10 | Southern terminus |
| ​ | 1.900 | 3.058 | End state maintenance on Coon Road | |
| Coon Road continues as a local road for 3.491 miles (5.618 km) |||||
| Coon | 1.900 | 3.058 | Resume state maintenance at Coon Road | |
| ​ | 3.561 | 5.731 | LA 973 | Northern terminus of LA 973 |
| Quinton | 9.011– 9.041 | 14.502– 14.550 | LA 419 | Western terminus of LA 419 |
| ​ | 9.960 | 16.029 | LA 418 | Southern terminus of LA 418 |
| Jacoby | 19.685 | 31.680 | LA 970 | Southern terminus of LA 970 |
| Legonier | 24.281 | 39.076 | LA 418 | Northern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## Louisiana Highway 418

Louisiana Highway 418 (LA 418) runs 21.90 miles (35.24 km) in a general north–south direction from LA 417 north of Quinton to LA 1 at Legonier, Pointe Coupee Parish.
The route heads northeast from LA 417 and crosses LA 1 in Innis. It then turns northward alongside the west bank levee of the Mississippi River past Williamsport and the Angola Ferry landing. At Torras, LA 418 curves westward and crosses LA 15 near the Old River Lock. The highway continues along the Lower Old River and Atchafalaya River to a second junction with LA 1 in Legonier at the foot of a bridge connecting to Simmesport. LA 418 is an undivided two-lane highway for its entire length.
The entire highway is in Pointe Coupee Parish.
| Location | mi | km | Destinations | Notes |
| ​ | 0.000 | 0.000 | LA 417 | Southern terminus |
| Innis | 3.938 | 6.338 | LA 1 (Gayden Road) – Simmesport, Morganza | |
| Williamsport | 5.653 | 9.098 | LA 971 | Eastern terminus of LA 971 |
| ​ | 9.059– 9.135 | 14.579– 14.701 | LA 3190 – Angola Ferry | Western terminus of LA 3190 |
| Torras | 12.978 | 20.886 | LA 15 | |
| ​ | 15.378 | 24.748 | LA 970 | Northern terminus of LA 970 |
| Legonier | 21.580 | 34.730 | LA 417 | Northern terminus of LA 417 |
| Legonier | 21.898 | 35.241 | LA 1 – Simmesport, Morganza | Northern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## Louisiana Highway 419

Louisiana Highway 419 (LA 419) runs 7.36 miles (11.84 km) in an east–west direction from LA 417 at Quinton to the junction of two private roads east of Lacour, Pointe Coupee Parish.
The entire highway is in Pointe Coupee Parish.
| Location | mi | km | Destinations | Notes |
| Quinton | 0.000– 0.039 | 0.000– 0.063 | LA 417 | Western terminus |
| Batchelor | 2.877 | 4.630 | LA 1 (Gayden Road) – Morganza, Simmesport | |
| Lacour | 6.170 | 9.930 | LA 972 | Eastern terminus of LA 972 |
| ​ | 7.359 | 11.843 | End state maintenance | Eastern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## Louisiana Highway 420

Louisiana Highway 420 (LA 420) runs 7.90 miles (12.71 km) in an east–west direction from the concurrent LA 1/LA 10 east of Morganza to the junction of LA 10 and LA 10 Bus. north of New Roads, Pointe Coupee Parish.
LA 420 initially heads north from LA 1/LA 10 past Pointe Coupee Central High School then reaches the west bank of the Mississippi River and turns eastward. Following the river levee to Pointe Coupee, the highway intersects LA 981. It then turns south a short distance to intersect LA 10. The road continues straight ahead into New Roads as LA 10 Bus. LA 420 is an undivided two-lane highway for its entire length.
The entire highway is in Pointe Coupee Parish.
| Location | mi | km | Destinations | Notes |
| Labarre | 0.000 | 0.000 | LA 1 / LA 10 – Morganza, New Roads | Western terminus |
| Pointe Coupee | 7.295 | 11.740 | LA 981 (Ferry Road) | Northern terminus of LA 981 |
| ​ | 7.895 | 12.706 | LA 10 – John James Audubon Bridge, Morganza LA 10 Bus. west – New Roads | Eastern terminus of LA 420; eastern terminus of LA 10 Bus. |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## Louisiana Highway 421

Louisiana Highway 421 (LA 421) runs 15.82 miles (25.46 km) in a southeast to northwest direction from LA 10 west of Jackson to US 61 north of St. Francisville, West Feliciana Parish.
The entire highway is in West Feliciana Parish.
| Location | mi | km | Destinations | Notes |
| ​ | 0.000 | 0.000 | LA 10 | Southeastern terminus |
| ​ | 8.893 | 14.312 | LA 967 | Southern terminus of LA 967 |
| Wakefield | 15.808– 15.821 | 25.441– 25.461 | US 61 – Baton Rouge, Natchez | Northwestern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## Louisiana Highway 422

Louisiana Highway 422 (LA 422) runs 12.12 miles (19.51 km) in an east–west direction from LA 19 in Norwood to LA 67 at Felps, East Feliciana Parish.
The route heads east on Oak Street from LA 19 (Main Street) in Norwood. After one block, LA 422 turns south onto Azalea Street and runs parallel to LA 19 for a short distance before resuming an eastward course for the remainder of its route. The highway travels through the northern central portion of the parish, just south of the Mississippi state line. The eastern terminus at Felps is located about 10 miles (16 km) north of Clinton. LA 422 is an undivided two-lane highway for its entire length.
The entire highway is in East Feliciana Parish.
| Location | mi | km | Destinations | Notes |
| Norwood | 0.000 | 0.000 | LA 19 (Main Street) – Wilson, Centreville | Western terminus |
| Felps | 12.123 | 19.510 | LA 67 – Clinton, Liberty | Eastern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## Louisiana Highway 423

Louisiana Highway 423 (LA 423) runs 2.43 miles (3.91 km) in an east–west direction along Thomas Road from LA 19 to LA 67 between Baton Rouge and Baker in East Baton Rouge Parish. As of 2018, it is under agreement to be removed from the state highway system and transferred to local control.
The entire highway is in East Baton Rouge Parish.
| Location | mi | km | Destinations | Notes |
| Baton Rouge | 0.000 | 0.000 | LA 19 (Scotland-Zachary Highway) – Baton Rouge, Zachary | Western terminus |
| Baker | 2.418– 2.427 | 3.891– 3.906 | LA 67 (Plank Road) – Baton Rouge, Clinton | Eastern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## Louisiana Highway 424

Louisiana Highway 424 (LA 424) runs 11.86 miles (19.09 km) in a general east–west direction from LA 62 north of Pine to a second junction with LA 62 north of State Line, Washington Parish.
The entire highway is in Washington Parish.
| Location | mi | km | Destinations | Notes |
| ​ | 0.000 | 0.000 | LA 62 – Pine | Southern terminus |
| ​ | 0.435 | 0.700 | LA 1070 north | Southern terminus of LA 1070 |
| Thomas | 3.970 | 6.389 | LA 438 – Hackley, State Line | |
| ​ | 11.858 | 19.084 | LA 62 – State Line | Northern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## Louisiana Highway 425

Louisiana Highway 425 (LA 425) ran 1.99 miles (3.20 km) in a north–south direction from LA 30 north of Gardere to LA 427 at Essen, East Baton Rouge Parish.

## Louisiana Highway 426

Louisiana Highway 426 (LA 426) runs 7.39 miles (11.89 km) in an east–west direction from LA 73 in Baton Rouge to US 190 between Baton Rouge and Denham Springs. The route is located entirely within East Baton Rouge Parish and is known locally as Old Hammond Highway.
LA 426 heads east from LA 73 (Jefferson Highway) in Baton Rouge as an undivided four-lane highway. It intersects LA 1068 (Drusilla Lane) just before crossing US 61 (Airline Highway), where the roadway widens to include a center turning lane. Shortly before exiting the city limits, LA 426 narrows to two lanes at an intersection with Boulevard de Province. The route proceeds eastward and intersects LA 3245 (O'Neal Lane) before terminating at US 190 (Florida Boulevard) just west of the Amite River.
LA 426 was the original traffic route between Baton Rouge and Denham Springs in the early 20th century. Known as Benton's Ferry Road, it traveled from Jefferson Highway (formerly called Clay Cut Road) to Benton's Ferry on the Amite River near the present location of the US 190 crossing. The ferry service was replaced in 1918 by a bridge (which was in turn replaced by an improved bridge crossing in 1933). The highway was designated as part of State Route 7 in 1921, and it became part of the original alignment of US 190 in 1926. Both designations were removed from the route in 1942 when an extension of Florida Boulevard from Downtown Baton Rouge to the Amite River was completed. The road remained in the state highway system as State Route 7-D until becoming LA 426 in the 1955 Louisiana Highway renumbering.
As of 2018, LA 426 is under agreement to be removed from the state highway system and transferred to local control.
The entire highway is in East Baton Rouge Parish.
| Location | mi | km | Destinations | Notes |
| Baton Rouge | 0.000 | 0.000 | LA 73 (Jefferson Highway) | Western terminus |
| Baton Rouge | 1.508 | 2.427 | LA 1068 (Drusilla Lane) | Northern terminus of LA 1068 |
| Baton Rouge | 1.703– 1.716 | 2.741– 2.762 | US 61 (Airline Highway) | |
| ​ | 6.516 | 10.486 | LA 3245 (O'Neal Lane) | |
| ​ | 7.378– 7.390 | 11.874– 11.893 | US 190 (Florida Boulevard) | Eastern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## Louisiana Highway 427

Louisiana Highway 427 (LA 427) runs 14.57 miles (23.45 km) in a northwest to southeast direction from LA 73 in Baton Rouge, East Baton Rouge Parish to a second junction with LA 73 at Hope Villa, Ascension Parish. It is a busy suburban commercial and residential thoroughfare over most of its route and almost entirely parallels I-10.
LA 427 heads south from LA 73 (Government Street) along South Acadian Thruway as an undivided four-lane highway. After passing through a diamond interchange with I-10 at exit 157B, the route turns southeast onto Perkins Road, gaining a center turning lane, and proceeds out of the Baton Rouge city limits. Intersections with several major thoroughfares connect with the interstate to the northeast, including LA 3064 (Essen Lane), LA 1248 (Bluebonnet Boulevard), and LA 3246 (Siegen Lane). The roadway narrows to two lanes after passing the latter junction and generally remains in that capacity for the remainder of the route. Just before it crosses into Ascension Parish, LA 427 briefly makes a jog onto LA 42 (Highland Road) through a second interchange with I-10 at Kleinpeter. The route then curves to the northeast at LA 928 (Bluff Road) and crosses US 61 (Airline Highway). Shortly afterward, LA 427 terminates at LA 73 (Old Jefferson Highway) south of Hope Villa, within the census-designated boundary of Prairieville. As of 2018, the portion of LA 427 in East Baton Rouge Parish is under agreement to be removed from the state highway system and transferred to local control.
| Parish | Location | mi | km | Destinations | Notes |
| East Baton Rouge | Baton Rouge | 0.000– 0.052 | 0.000– 0.084 | LA 73 (Government Street) | Northwestern terminus |
| East Baton Rouge | Baton Rouge | 1.377– 1.501 | 2.216– 2.416 | I-10 – Downtown Baton Rouge, Hammond, New Orleans | Exit 157B on I-10 |
| East Baton Rouge | Baton Rouge | 4.869 | 7.836 | LA 3064 east (Essen Lane) to I-10 | Western terminus of LA 3064 |
| East Baton Rouge | ​ | 6.174– 6.183 | 9.936– 9.951 | LA 1248 (Bluebonnet Boulevard) | |
| East Baton Rouge | ​ | 7.786 | 12.530 | LA 3246 (Siegen Lane) | |
| East Baton Rouge | ​ | 10.957 | 17.634 | LA 42 west (Highland Road) | West end of LA 42 concurrency |
| 0.266-mile (0.428 km) concurrency with LA 42 not counted in official route mileage ||||||
| East Baton Rouge | ​ | | | I-10 – Baton Rouge, New Orleans | Exit 166 on I-10 |
| East Baton Rouge | Kleinpeter | 10.957 | 17.634 | LA 42 east (Highland Road) | East end of LA 42 concurrency; resume LA 427 mileage |
| Ascension | ​ | 13.142 | 21.150 | LA 928 south (Bluff Road) – Dutchtown, St. Gabriel | Northern terminus of LA 928 |
| Ascension | Hope Villa | 14.345– 14.356 | 23.086– 23.104 | US 61 (Airline Highway) – Baton Rouge, New Orleans | |
| Ascension | Hope Villa | 14.574 | 23.455 | LA 73 (Old Jefferson Highway) | Southeastern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus ||||||

## Louisiana Highway 428

Louisiana Highway 428 (LA 428) runs 8.82 miles (14.19 km) from LA 23 near Belle Chasse to LA 407 in New Orleans. The route travels in an irregular direction and exists in two segments connected by local roads. The portion that travels on General de Gaulle Drive, however, is bannered east–west.
LA 428 begins at a point on LA 23 (Belle Chasse Highway) between Belle Chasse and Gretna near the Jefferson–Plaquemines parish line. It heads north on Behrman Highway, an undivided four-lane thoroughfare with a center turning lane. The highway crosses from Jefferson Parish into an area of New Orleans (co-extensive with Orleans Parish) known as Algiers. Just before the local name changes to Behrman Place, the center lane is replaced by a median, and the route proceeds to an intersection with General de Gaulle Drive. LA 428 turns west onto General de Gaulle Drive, a divided six-lane thoroughfare with a wide right-of-way that includes a drainage canal. The highway engages into a partial cloverleaf interchange with US 90 Bus. (Westbank Expressway). Approaching this junction, the westbound carriageway widens to five lanes to accommodate traffic exiting onto the Crescent City Connection into Downtown New Orleans.
Passing through the interchange, the roadway narrows to a divided four-lane highway, and LA 428 soon crosses back into Jefferson Parish and enters the city of Gretna, where the local name changes to Burmaster Street. LA 428 then turns north onto Franklin Avenue at the northern terminus of LA 23 and remains a divided four-lane highway. The highway re-enters the city of New Orleans for a final time, and the local name changes to Nunez Street. LA 428 crosses underneath the Crescent City Connection on US 90 Bus. and engages into a roundabout with Mardi Gras Boulevard, a local road, at grade level between the two bridge spans. Shortly afterward, LA 428 turns to the northeast, and state maintenance ends at the five-point intersection of Lamarque, Vallette, Verret, and Hermosa Streets. Local traffic may travel north on Vallette Street and east onto Newton Street, where state maintenance resumes at an intersection with Behrman Avenue. Here, the roadway widens from two lanes to four lanes with a median and becomes known as General Meyer Avenue. LA 428 proceeds eastward to a terminus at LA 407 (Woodland Drive).
As of 2019, a small portion in Jefferson Parish intersecting LA 23 is under agreement to be removed from the state highway system and transferred to local control.
| Parish | Location | mi | km | Destinations | Notes |
| Jefferson | ​ | 0.000– 0.009 | 0.000– 0.014 | LA 23 (Belle Chasse Highway) – Belle Chasse, Gretna | Southern terminus |
| Orleans | New Orleans | 3.999– 4.400 | 6.436– 7.081 | US 90 Bus. (Westbank Expressway) – Gretna, New Orleans | Exit 9 on US 90 Bus.; to Crescent City Connection |
| Jefferson | Gretna | 4.963 | 7.987 | LA 23 south (Franklin Avenue) | Northern terminus of LA 23 |
| Orleans | New Orleans | 5.862 | 9.434 | Lamarque Street / Vallette Street / Verret Street | End state maintenance |
| Gap in LA 428 ||||||
| Orleans | New Orleans | 5.862 | 9.434 | Behrman Avenue / General Meyer Avenue / Newton Street | Resume state maintenance |
| Orleans | New Orleans | 8.731– 8.817 | 14.051– 14.190 | LA 407 south (Woodland Drive) | Northern terminus of LA 407 and LA 428 |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi ||||||

## Louisiana Highway 429

Louisiana Highway 429 (LA 429) runs 10.19 miles (16.40 km) in an east–west direction from LA 73 west of Gonzales to LA 22 north of Sorrento, Ascension Parish.
The entire highway is in Ascension Parish.
| Location | mi | km | Destinations | Notes |
| ​ | 0.000 | 0.000 | LA 73 – Dutchtown, Geismar | Western terminus |
| Gonzales | 4.590 | 7.387 | LA 44 south (South Burnside Avenue) LA 3038 (East Cornerview Street) | West end of LA 44 concurrency; western terminus of LA 3038 |
| Gonzales | 4.970 | 7.998 | LA 44 north (North Burnside Avenue) | East end of LA 44 concurrency |
| Gonzales | 5.545– 5.555 | 8.924– 8.940 | US 61 (North Airline Highway) – Baton Rouge, New Orleans | |
| St. Amant | 8.382 | 13.490 | LA 431 – Brittany, Port Vincent, Denham Springs | |
| ​ | 10.190 | 16.399 | LA 22 – Springfield, Ponchatoula | Eastern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## Louisiana Highway 430

Louisiana Highway 430 (LA 430) runs 10.09 miles (16.24 km) in a north–south direction from LA 25 in Franklinton to LA 438 at Hackley, Washington Parish.
The entire highway is in Washington Parish.
| Location | mi | km | Destinations | Notes |
| Franklinton | 0.000– 0.025 | 0.000– 0.040 | LA 25 (Main Street, Bene Street) | Southern terminus |
| Franklinton | 0.195 | 0.314 | LA 1069 south (11th Avenue) | Northern terminus of LA 1069 |
| ​ | 7.610 | 12.247 | LA 38 west – Mount Hermon, Kentwood | Eastern terminus of LA 38 |
| Hackley | 10.091 | 16.240 | LA 438 | Northern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## Louisiana Highway 431

Louisiana Highway 431 (LA 431) runs 9.60 miles (15.45 km) from St. Amant to Port Vincent.

## Louisiana Highway 432

Louisiana Highway 432 (LA 432) runs 9.54 miles (15.35 km) from Woodland to Chipola.

## Louisiana Highway 433

Louisiana Highway 433 (LA 433) is a state highway in Louisiana that serves Slidell.

## Louisiana Highway 434

Louisiana Highway 434 (LA 434) runs 10.66 miles (17.16 km) in a north–south direction from a point south of US 190 in Lacombe to LA 36 between Abita Springs and Hickory, St. Tammany Parish.
From the south, LA 434 begins at the intersection of Lake Road and Barringer Road about 2 miles (3.2 km) from the shore of Lake Pontchartrain. It proceeds northward on Lake Road to a junction with US 190 and LA 1093-1. At this point, it turns northeast concurrent with US 190 across Bayou Lacombe. Shortly thereafter, LA 434 turns northward and eventually intersects I-12 at a diamond interchange at Exit 74. It continues northward through the community of St. Tammany to a terminus at LA 36.
LA 434 is an undivided two-lane highway for its entire length.
The entire highway is in St. Tammany Parish.
| Location | mi | km | Destinations | Notes |
| Lacombe | 0.0 | 0.0 | Lake Road, Barringer Road | Southern terminus |
| Lacombe | 1.6 | 2.6 | US 190 west – Mandeville LA 1093-1 (Davis Avenue) | South end of US 190 concurrency; southern terminus of LA 1093-1 |
| Lacombe | 1.9 | 3.1 | US 190 east – Slidell | North end of US 190 concurrency; roundabout |
| Lacombe | 4.4– 4.8 | 7.1– 7.7 | I-12 – Slidell, Hammond | Exit 74 on I-12 |
| St. Tammany | 10.3 | 16.6 | LA 36 (Hickory Highway) | Northern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus |||||

## Louisiana Highway 435

Louisiana Highway 435 (LA 435) runs 11.47 miles (18.46 km) in an east–west direction from LA 36/LA 59 in Abita Springs to LA 41 in Talisheek. It is an undivided two-lane highway for its entire length.
The route has a spur that travels 0.70 miles (1.13 km) to an alternate connection with LA 41, essentially forming a large Y-junction between LA 435 and LA 41.
The entire highway is in St. Tammany Parish.
| Location | mi | km | Destinations | Notes |
| Abita Springs | 0.0 | 0.0 | LA 36 / LA 59 (Level Street, Maple Street) | Western terminus; roundabout |
| Talisheek | 11.0 | 17.7 | LA 435 Spur north to LA 41 | Southern terminus of LA 435 Spur |
| Talisheek | 11.5 | 18.5 | LA 41 – Bogalusa, Pearl River | Eastern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## Louisiana Highway 436

Louisiana Highway 436 (LA 436) runs 26.14 miles (42.07 km) from Franklinton to Varnado.

## Louisiana Highway 437

Louisiana Highway 437 (LA 437) runs 20.63 miles (33.20 km) from Covington to Zona.

## Louisiana Highway 438

Louisiana Highway 438 (LA 438) runs 37.78 miles (60.80 km) from Mt. Hermon to Angie.

## Louisiana Highway 439

Louisiana Highway 439 (LA 439) runs 12.71 miles (20.45 km) from Sheridan to Bogalusa.

## Louisiana Highway 440

Louisiana Highway 440 (LA 440) runs 27.56 miles (44.35 km) in an east–west direction from LA 441 north of Greensburg, St. Helena Parish to LA 10 west of Franklinton, Washington Parish.
The route heads east from LA 441 from a point just north of the Hutchinson Creek Wildlife Management Area and soon crosses from St. Helena Parish into Tangipahoa Parish. It then passes through an interchange with I-55 south of Kentwood and intersects the parallel US 51 in Tangipahoa. Just east of Tangipahoa, the roadway continues straight ahead as LA 1057 while LA 440 dips to the south onto a parallel alignment through Bolivar. Just before crossing into Washington Parish, LA 440 curves to the northeast and rejoins LA 1057. In Washington Parish, LA 440 heads slightly southeast to its terminus at LA 10 in Richardson, a point west of Franklinton.

## Louisiana Highway 441

Louisiana Highway 441 (LA 441) runs 43.74 miles (70.39 km) in a north–south direction from LA 42 west of Springfield to the Mississippi state line north of Easleyville.
| Parish | Location | mi | km | Destinations | Notes |
| Livingston | ​ | 0.000 | 0.000 | LA 42 – Springfield, French Settlement | Southern terminus |
| Livingston | ​ | 2.110– 2.551 | 3.396– 4.105 | I-12 – Hammond, Baton Rouge | Exit 29 on I-12 |
| Livingston | Holden | 4.960 | 7.982 | US 190 (Florida Boulevard) – Albany, Livingston | |
| Livingston | ​ | 5.583 | 8.985 | LA 1036 north | Southern terminus of LA 1036 |
| Livingston | Starns | 9.147– 9.216 | 14.721– 14.832 | LA 442 east | South end of LA 442 concurrency |
| Livingston | Starns | 9.224– 9.308 | 14.845– 14.980 | Bridge over Tickfaw River | Bridge over Tickfaw River |
| Livingston | Starns | 5.877 | 9.458 | LA 442 west | North end of LA 442 concurrency |
| St. Helena | Montpelier | 16.744 | 26.947 | LA 1036 west | Northern terminus of LA 1036 (signed east–west here) |
| St. Helena | Montpelier | 17.840 | 28.711 | LA 16 west (4th Street) – Pine Grove | South end of LA 16 concurrency |
| St. Helena | Montpelier | 17.989 | 28.950 | LA 43 north – Greensburg | South end of LA 43 concurrency |
| St. Helena | Montpelier | 18.317– 18.486 | 29.478– 29.750 | Bridge over Tickfaw River | Bridge over Tickfaw River |
| St. Helena | ​ | 19.870 | 31.978 | LA 16 east – Amite LA 43 south – Albany | North end of LA 16 and LA 43 concurrencies |
| St. Helena | Hillsdale | 23.691 | 38.127 | LA 1045 | |
| St. Helena | ​ | 24.467 | 39.376 | LA 1046 east | Western terminus of LA 1046 |
| St. Helena | ​ | 27.836 | 44.798 | LA 1047 east | Northern terminus of LA 1047 (signed east–west here) |
| St. Helena | ​ | 29.816 | 47.984 | LA 10 east – Fluker | South end of LA 10 concurrency |
| St. Helena | ​ | 30.446 | 48.998 | LA 10 west – Greensburg | North end of LA 10 concurrency |
| St. Helena | ​ | 35.349 | 56.889 | LA 440 east | Western terminus of LA 440 |
| St. Helena | ​ | 38.160 | 61.413 | LA 38 east – Kentwood | South end of LA 38 concurrency |
| St. Helena | ​ | 38.760 | 62.378 | LA 38 west – Easleyville | North end of LA 38 concurrency |
| St. Helena | ​ | 43.744 | 70.399 | MS 571 north – Gillsburg | Northern terminus; continuation in Mississippi |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus ||||||

## Louisiana Highway 442

Louisiana Highway 442 (LA 442) runs 23.22 miles (37.37 km) in an east–west direction from LA 63 north of Livingston to the junction of LA 40 and LA 443 north of Hammond.
The route heads east from LA 63 and intersects LA 1036 and LA 441, both of which it overlaps as it crosses various branches of the Tickfaw River. Further east, LA 442 intersects LA 43 and crosses from Livingston Parish into Tangipahoa Parish. Just west of Tickfaw, LA 442 passes through a diamond interchange with I-55 at exit 36. In the center of town, LA 442 zigzags via US 51 and proceeds northeast out of the corporate limits. After crossing the Tangipahoa River, the route curves due east to its terminus at a four-way junction with LA 40 and LA 443 south of Loranger. LA 442 is an undivided two-lane highway for its entire length.
| Parish | Location | mi | km | Destinations | Notes |
| Livingston | ​ | 0.0 | 0.0 | LA 63 – Livingston | Western terminus |
| Livingston | Magnolia, Livingston Parish | 3.2 | 5.1 | LA 1036 north | West end of LA 1036 concurrency |
| Livingston | ​ | 4.2 | 6.8 | LA 1036 south | East end of LA 1036 concurrency |
| Livingston | ​ | 5.9 | 9.5 | LA 441 north | West end of LA 441 concurrency |
| Livingston | Starns | 6.2 | 10.0 | LA 441 south | East end of LA 441 concurrency |
| Livingston | ​ | 10.6 | 17.1 | LA 43 – Albany, Montpelier | |
| Livingston–Tangipahoa parish line | ​ | 12.0 | 19.3 | LA 1063 north | Southern terminus of LA 1063 |
| Tangipahoa | ​ | 15.5– 15.9 | 24.9– 25.6 | I-55 – Hammond, Jackson | Exit 36 on I-55 |
| Tangipahoa | Tickfaw | 16.9 | 27.2 | US 51 north | West end of US 51 concurrency |
| Tangipahoa | Tickfaw | 17.0 | 27.4 | US 51 south | East end of US 51 concurrency |
| Tangipahoa | ​ | 18.4 | 29.6 | LA 1065 | |
| Tangipahoa | ​ | 23.0 | 37.0 | LA 40 / LA 443 south | Eastern terminus of LA 442; northern terminus of LA 443 |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus ||||||

## Louisiana Highway 443

Louisiana Highway 443 (LA 443) runs 8.30 miles (13.36 km) in a north–south direction along Morris Road from US 190 in Hammond to a junction with LA 40 and LA 442 south of Loranger, Tangipahoa Parish.
The route heads northeast out of Hammond and has a brief concurrency with LA 1064 north of town. After crossing the Tangipahoa River, LA 443 turns due north to its end at LA 40 and LA 442, connecting to Tickfaw, Independence, and Folsom. LA 443 is an undivided two-lane highway for its entire length.
The entire highway is in Tangipahoa Parish.
| Location | mi | km | Destinations | Notes |
| Hammond | 0.0 | 0.0 | US 190 – Hammond, Covington | Southern terminus |
| ​ | 3.0 | 4.8 | LA 1064 west (Natalbany Road) – Natalbany | South end of LA 1064 concurrency |
| ​ | 4.4 | 7.1 | LA 1064 east (River Road) | North end of LA 1064 concurrency |
| ​ | 5.4 | 8.7 | Bridge over Tangipahoa River | Bridge over Tangipahoa River |
| ​ | 8.2 | 13.2 | LA 40 – Loranger, Folsom LA 442 west – Tickfaw | Northern terminus; eastern terminus of LA 442 |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus |||||

## Louisiana Highway 444

Louisiana Highway 444 (LA 444) runs 14.76 miles (23.75 km) in an east–west direction from LA 16 in French Settlement to LA 22 in Killian, Livingston Parish.
The route heads northeast out of French Settlement, intersecting LA 63 at Verdun, and parallels the route of LA 22 into Killian. LA 444 is an undivided two-lane highway for its entire length.
The entire highway is in Livingston Parish.
| Location | mi | km | Destinations | Notes |
| French Settlement | 0.0 | 0.0 | LA 16 – Head of Island, Port Vincent | Western terminus |
| Verdun | 4.9 | 7.9 | LA 63 (South Frost Road) – Frost, Livingston | Southern terminus of LA 63 |
| Killian | 14.8 | 23.8 | LA 22 – Springfield, Hammond | Eastern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus |||||

## Louisiana Highway 445

Louisiana Highway 445 (LA 445) is a state highway in Louisiana that serves Tangipahoa Parish.

## Louisiana Highway 447

Louisiana Highway 447 (LA 447) runs 20.19 miles (32.49 km) in a north–south direction from LA 16 in Port Vincent to LA 63 north of Walker, Livingston Parish.
The route heads north from LA 16 in Port Vincent as an undivided two-lane highway. Upon entering Walker, LA 447 passes through a diamond interchange with I-12 at Exit 15. The highway widens to four lanes with a center turning lane and proceeds through downtown Walker, crossing both US 190 and LA 1027. Reverting again to two lanes, LA 447 proceeds north through rural west-central Livingston Parish and intersects LA 1029, LA 1025, LA 1024, and LA 1019 before ending at LA 63 near the St. Helena Parish line.
The entire highway is in Livingston Parish.
| Location | mi | km | Destinations | Notes |
| Port Vincent | 0.0 | 0.0 | LA 16 – Port Vincent, Denham Springs | Southern terminus |
| Walker | 8.2– 8.6 | 13.2– 13.8 | I-12 – Hammond, Baton Rouge | Exit 15 on I-12 |
| Walker | 9.6 | 15.4 | US 190 (Florida Boulevard) | |
| Walker | 9.7 | 15.6 | LA 1027 west (Burgess Avenue) | Eastern terminus of LA 1027 |
| ​ | 11.3 | 18.2 | LA 1029 south | Northern terminus of LA 1029 |
| ​ | 13.0 | 20.9 | LA 1025 west (Arnold Road) | Eastern terminus of LA 1025 |
| ​ | 15.0 | 24.1 | LA 1024 (Cane Market Road) | |
| Friendship | 16.5 | 26.6 | LA 1019 (Springfield Road) | |
| ​ | 20.3 | 32.7 | LA 63 | Northern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## Louisiana Highway 448

Louisiana Highway 448 (LA 448) runs 8.59 miles (13.82 km) in a north–south direction from LA 37 north of Grangeville to LA 10 at Darlington, St. Helena Parish.
A rural route heading along the west side of St. Helena Parish, LA 444 parallels the Amite River at a distance, connecting LA 10 and LA 37, which intersect in Greensburg to the east. It is an undivided two-lane highway for its entire length.
The entire highway is in St. Helena Parish.
| Location | mi | km | Destinations | Notes |
| ​ | 0.0 | 0.0 | LA 37 – Greensburg, Baton Rouge | Southern terminus |
| Darlington | 8.6 | 13.8 | LA 10 – Greensburg, Clinton | Northern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi |||||

## Louisiana Highway 449

Louisiana Highway 449 (LA 449) runs 23.73 miles (38.19 km) in a north–south direction from US 190 in Walker, Livingston Parish to LA 37 southwest of Greensburg, St. Helena Parish.
LA 449 heads north from Walker and intersects LA 1024, followed by LA 63. LA 449 turns west concurrent with LA 63 for a very short time before the former turns again to the north. After crossing from Livingston Parish into St. Helena Parish, LA 449 enters the community of Pine Grove, where it intersects LA 16. LA 449 makes a brief jog east onto LA 16 before proceeding north again at LA 1041. LA 449 continues in a north-northeast direction to a terminus at LA 37 southeast of Greensburg.
LA 449 is an undivided two lane highway for its entire length.
| Parish | Location | mi | km | Destinations | Notes |
| Livingston | Walker | 0.0 | 0.0 | US 190 (Florida Boulevard) | Southern terminus |
| Livingston | ​ | 4.5 | 7.2 | LA 1024 (Cane Market Road) | |
| Livingston | ​ | 8.3 | 13.4 | LA 63 south (Weiss Road) | South end of LA 63 concurrency |
| Livingston | ​ | 8.4 | 13.5 | LA 63 north (Weiss Road) | North end of LA 63 concurrency |
| St. Helena | Pine Grove | 16.4 | 26.4 | LA 16 west | South end of LA 16 concurrency |
| St. Helena | Pine Grove | 16.5 | 26.6 | LA 16 east / LA 1041 eest | North end of LA 16 concurrency; western terminus of LA 1041 |
| St. Helena | ​ | 23.8 | 38.3 | LA 37 | Northern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus ||||||