The highway enters Baker as it intersects LA 3006 (Lavey Lane), a second connector to nearby LA 67. Widening to accommodate a center turning lane, LA 19 proceeds through Baker on Main Street, its principal commercial thoroughfare. The suburb's main junction is an intersection with Groom Road, a local road that connects with LA 964 and LA 67 on either side of town. North of Baker, LA 19 passes through the small city of Zachary, where it diverges slightly from the CN railroad line for the first time. The highway intersects LA 64 (Main Street) in the center of town, connecting with US 61 to the west and the city of Central to the east. Proceeding northward from this junction, LA 19 narrows again to an undivided two-lane highway. It rejoins the CN railroad heading out of Zachary and then crosses from East Baton Rouge Parish into East Feliciana Parish.