After crossing into St. Mary Parish, LA 83 traverses the small rural communities of Louisa, Glencoe, and Four Corners en route to the town of Baldwin.

Resuming its southward course, LA 83 traverses a remote stretch of wetlands, which includes a swing bridge across Bayou Patout, before crossing a salt dome known as Weeks Island.

The route then curves east with the Louisiana and Delta Railroad (LDRR) line and passes alongside the small community of Louisa.

Upon reaching its final destination, the town of Baldwin, LA 83 widens to a divided four-lane highway and passes through another interchange with US 90.

Over the years, however, US 90 was relocated in stages onto its current alignment, and LA 182 has been extended to cover the bypassed route along Bayou Teche.

[10] This project also included relocating the eastern portion of LA 83 off of what is now Martin Luther King Jr. Street and onto a new four-lane roadway.

More recently, a small realignment in Iberia Parish occurred when the Bayou Patout swing bridge, constructed in 1949,[12] was replaced with a modern structure in 2011.

[13] La DOTD is currently engaged in a program that aims to transfer about 5,000 miles (8,000 km) of state-owned roadways to local governments over the next several years.