As of December 2017, the plant is the fourth-largest taxpayer[1] and the tenth largest employer[2] in Harris County.

The refinery has a 275,000 bbl/d (43,700 m3/d) crude processing capacity,[3] making it the 18th largest in the US,[4] as of January 2019, with a facility that includes crude & vacuum distillation, delayed coker, fluid catalytic cracker, hydrocracker, polymerization, and alkylation units.

[5] Construction of the Deer Park refinery began in 1929, on an 800-acre site, and has expanded several times over the years.

On May 24, 2021, Pemex and Shell reached an agreement for the sale of Shell´s interest in Deer Park Refining Limited Partnership, transferring full ownership of the refinery to Pemex, subject to regulatory approval.

[5] On January 20, 2022, Shell completed sale of their interest in the Deer Park refinery to Pemex.