The USCGC Bibb (WPG-31) was a 327-foot (100 m) Secretary-Class (also known as "Treasury Class") Coast Guard ship commissioned in 1936.

In 1944 Bibb provided convoy escort between the United States and North Africa — mainly to Bizerte in Tunisia.

In peacetime the Bibb spent time on ocean station providing weather information and beacons to trans-Atlantic traffic.

The ship was sunk in November 1987 just outside the coral reef tract, about six miles (10 km) offshore of the island of Key Largo.

Among those serving on Bibb was James A. Watson, a rear admiral who was the onsite ranking officer in the Deepwater Horizon oil spill.