| State: | MIC |
| Type: | FH |
| Route: | 37D |
| Alternate Name: | Autopista Uruapan-Lázaro Cárdenas Autopista Siglo XXI |
| Maint: | Autopistas Michoacán |
| Length Km: | 218.5 |
| Length Ref: | [1] |
| Direction A: | North |
| Direction B: | South |
| Terminus A: | at Uruapan, Michoacán |
| Junction: | at Nueva Italia, Michoacán near Joluta, Guerrero near Lázaro Cárdenas, Michoacán |
| Terminus B: | Av. Lázaro Cárdenas in Lázaro Cárdenas, Michoacán |
Federal Highway 37D is a Mexican toll highway in Michoacán and Guerrero. It connects Highway 14D at Uruapan to Lázaro Cárdenas. The road is operated by Autopistas Michoacán, which charges a toll of 307 pesos per car to travel the full length of Highway 37D.[2]
Highway 14D from Pátzcuaro southwest, along with the entirety of Highway 37D, are together referred to as the Autopista Siglo XXI.