1841 Census - surnames beginning with I
| Last Name | First Name | Age | Parish | Piece | Folio | Page |
| IMESON | Christopher | 70 | Onchan | 1465/1 | 26 | 12 |
| IMESON | Eleanor | 48 | Onchan | 1465/1 | 26 | 12 |
| IMESON | Jane | 65 | Onchan | 1465/1 | 26 | 12 |
| INCH | Caesar | 30 | Douglas | 1465/4 | 5 | 4 |
| INCH | Caesar | 9 | Douglas | 1465/4 | 5 | 4 |
| INCH | Catherine | 65 | Douglas | 1465/4 | 5 | 4 |
| INCH | Catherine | 60 | Douglas | 1465/4 | 5 | 4 |
| INCH | Isabella | 17 | Douglas | 1465/4 | 5 | 4 |
| INCH | Jane | 25 | Douglas | 1465/4 | 5 | 4 |
| INCH | Jane | 15 | Douglas | 1465/4 | 6 | 5 |
| INCH | John | 30 | Douglas | 1465/4 | 5 | 4 |
| INCH | Margaret | 7 mos | Douglas | 1465/4 | 5 | 4 |
| INCH | Mary | 19 | Douglas | 1465/4 | 5 | 4 |
| INCH | Mary Ann | 3 | Douglas | 1465/4 | 5 | 4 |
| INCH | Thomas | 8 | Douglas | 1465/4 | 5 | 4 |
| INNES | Isabella | 40 | Onchan | 1465/1 | 4 | 1 |
| INNES | William | 50 | Onchan | 1465/1 | 4 | 1 |
| IRVIN | Jane | 14 | Peel | 1463/8 | 49 | 26 |
| IRVIN | Mary | 40 | Peel | 1463/8 | 49 | 26 |
| IRVIN | Samuel | 55 | Peel | 1463/8 | 49 | 26 |
| IRVIN | Samuel | 10 | Peel | 1463/8 | 49 | 26 |
| IRVIN | William | 25 | Peel | 1463/8 | 49 | 26 |
| IRVING | Helen | 30 | Douglas | 1465/7 | 22 | 39 |
| IRVING | Hugh | 2 | Douglas | 1465/7 | 22 | 39 |
| IRVING | James | 44 | Douglas | 1465/7 | 22 | 39 |
| IRVING | James | 5 | Douglas | 1465/7 | 22 | 39 |
| IRVING | Janet | 10 | Douglas | 1465/7 | 22 | 39 |
| ISEDALE | Ann | 37 | Douglas | 1465/8 | 16 | 27 |
| ISEDALE | Ann | 3 | Douglas | 1465/8 | 16 | 27 |
| ISDALE | Catherine | 50 | Douglas | 1465/7 | 10 | 16 |
| ISDALE | Catherine | 2 | Douglas | 1465/7 | 10 | 16 |
| ISEDALE | Charles | 7 | Douglas | 1465/8 | 16 | 27 |
| ISDALE | Isabella | 28 | Douglas | 1465/7 | 10 | 16 |
| ISDALE | James | 33 | Douglas | 1465/7 | 10 | 15 |
| ISDALE | Jane | 22 | Douglas | 1465/7 | 10 | 16 |
| ISDALE | Sarah | 12 | Douglas | 1465/7 | 10 | 16 |
| ISEDALE | William | 6 | Douglas | 1465/8 | 16 | 27 |
| IVERSON | John | 20 | Ramsey | 1464/8 | 27 | 19 |