It's right on the battery, the label in the center with the symbols - made by Johnson Controls (they make many different brands Diehard, Interstate, Optima, Motocraft etc.).
Only 2 other companies make batteries in the US - Exide (mostly Champion, Exide & Napa) & Delphi (mostly ACDelco).
Everlast (Wal-mart) batteries are sourced from all 3.