John Penn and Sons
| Industry | Engineering |
|---|---|
| Founded | 1799? |
| Fate | Amalgamated, 1899 |
| Successor | Thames Iron Works Ship Building and Engineering Co. |
| Headquarters | London, England |
Key people | John Penn |
| Products | Marine steam engines |
John Penn and Sons was an English engineering company based in London, and mainly known for its marine steam engines.