53rd Infantry Regiment, is a unit of the Philippine Commonwealth Army activated and organized in 1941.

[1] 53rd Infantry Regiment was formed in November 1941, in 3 Provinces of Bicol Peninsula Catanduanes, Sorsogon, and Masbate.

I was activated as component of 51st Infantry Division under Brigadier General Albert M. Jones.

In Bataan, 51st Division was assigned at Eastern Sector with units mostly from South Luzon Force.

It was renamed to II Philippine Corps and form Abucay Hacienda Line.