| Company type | Private |
|---|---|
| Industry | Manufacturing |
| Predecessor | None |
| Founded | 1880 |
| Founder | John Roach |
| Headquarters | , United States |
| Products | Steel rails, bars and other steel parts |
| Owner | John Roach (to 1885) |
| Parent | John Roach & Sons |
The Combination Steel and Iron Company was a steel mill founded in Chester, Pennsylvania by shipbuilder John Roach in 1880. Unlike Roach's other companies, Combination Iron and Steel was initially established not to support the operations of his Chester shipyard, but to produce steel rails and other products for third parties. Roach lost control of the company after his shipbuilding business entered receivership in 1885.