Exhibit 3.21

CERTIFICATE OF FORMATION

OF

PBF ENERGY WESTERN REGION LLC

The undersigned, acting as the organizer of a limited liability company under the Delaware Limited Liability Company Act, certifies as follows:

1. The name of the limited liability company is PBF Energy Western Region LLC.

2. The address of its registered office in the State of Delaware is: Corporation Trust Center, 1209 Orange Street, in the City of Wilmington, Delaware 19801. The name of its registered agent at such address is The Corporation Trust Company.

IN WITNESS WHEREOF, the undersigned have executed this Certificate of Formation of PBF Energy Western Region LLC this 2nd day of October, 2015.

/s/ Trecia Canty

Trecia Canty

Authorized Person