| Census: | 1841 |
| County: | Cornwall (CON) |
| District: | Penwith |
| Civil Parish: | Illogan |
| Piece: | 142 |
| Enumeration District: | 8 |
| Folio: | 9 |
| Page: | 11 |
| House Number: | |
| House or Street Name: | Porthtowan |
| Surname | Forenames | Sex | Age | Occupation | Birth County | Notes |
| BARTLEY | William | M | 30 | Copper Miner | Cornwall | |
| BARTLEY | Susan | F | 25 | Cornwall | ||
| BARTLEY | John | M | 3 | Cornwall | ||
| BARTLEY | Susan | F | 1 | Cornwall |