| Knights of Columbus | Related tax-exempt org | Fraternal benefit organization | CT | 060416470 |
| The Knights of Columbus Museum INC | Related tax-exempt org | Operation of a museum | CT | 061590283 |
| Knights of Columbus Charities INC | Related tax-exempt org | Established for religious, charitable, and educational purposes | CT | 237227608 |
| JOHN PAUL II Shrine and Institute INC | Related tax-exempt org | Operation of an educational institute and a shrine | DC | 521547103 |
| Knights of Columbus Canada Charities INC | Related tax-exempt org | Established for religious, charitable, and educational purposes | — | — |
| Centro Sportivo Cavalieri SRL | Related taxable corporation/trust | Operation of playgrounds | — | — |
| K of C Polska SP | Related taxable corporation/trust | Direct and oversee expansion of fraternal services in europe | — | — |