| Trigwell | John. | Publican | Preston | 1881 | Herald Almanack |
| Trigwell | John. | Publican | Wellington District (Preston, Upper Capel, towards Blackwood, Etc.) | 1881 | WA Almanack |
| Trigwell | Mrs B. | Farmer & Grazier, Bullrush Creek | Preston | 1897 | Witton's Directory |
| Trigwell | Mrs Chas R. | Postmistress, Preston | Preston | 1897 | Witton's Directory |
| Trigwell | Mrs. | Grazier, Brookland | Preston | 1897 | Witton's Directory |
| Trigwell | P. Jno. | Publican | Preston | 1885 | Herald Almanack |
| Trigwell | Richd. | Farmer | Preston | 1885 | Herald Almanack |
| Trigwell | Thos. | Grazier | Preston | 1897 | Witton's Directory |
| Trigwell | W. W. | Careydale | Preston | 1897 | Witton's Directory |
| Trigwell | Walter | Farmer | Preston | 1879 | Herald Almanack |
| Trigwell | Walter | Farmer | Preston | 1882 | Herald Almanack |
| Trigwell | Walter | Farmer | Preston | 1883 | Herald Almanack |
| Trigwell | Walter | Farmer & Grazier | Preston | 1884 | Herald Almanack |
| Trigwell | Walter | Farmer | Preston | 1885 | Herald Almanack |
| Trigwell | Walter. | Farmer & Grazier | Preston | 1880 | Herald Almanack |
| Trigwell | Walter. | Farmer | Preston | 1881 | Herald Almanack |
| Trimmer | A. | Sub-Grdn. Of Native | Albany | 1865 | WA Almanack |
| Trimmer | A. | Sub-Grdn. of Natives | Albany | 1866 | WA Almanack |
| Trimmer | A. | Sub. Grdn.Of Natives | Albany | 1867 | WA Almanack |
| Trimmer | A. | Sub-Grdn. of Natives | Albany | 1868 | WA Almanack |
| Trimmer | A. | Farmer & Sheepowner | Road between Perth & Albany (Gordon) | 1869 | WA Almanack |
| Trimmer | A. | Farmer & Sheepowner | Road between Perth & Albany (Gordon) | 1870 | WA Almanack |
| Trimmer | A. | Farmer and Sheepowner | Road Between Perth & Albany (Gordon) | 1872 | WA Almanack |
| Trimmer | A. | Farmer | Albany | 1872 | WA Almanack |
| Trimmer | A. | Farmer | Albany | 1873 | Herald Almanack |
| Trimmer | A. | Farmer & Sheepowner | Kojonup | 1873 | Herald Almanack |
| Trimmer | A. | Farmer and Sheepowner | Albany Road (Gordon) | 1873 | WA Almanack |
| Trimmer | A. | Farmer | Albany | 1874 | Herald Almanack |
| Trimmer | A. | Farmer & Sheepowner | Gordon | 1874 | Herald Almanack |
| Trimmer | A. | Farmer & Sheepowner | Albany Road (Kojonup & Gordon) | 1874 | WA Almanack |
| Trimmer | A. | Farmer | Albany | 1877 | WA Almanack |
| Trimmer | A. | Farmer & Sheepowner | Gordon River | 1883 | Herald Almanack |
| Trimmer | A. | Farmer & Sheepowner | Gordon River | 1884 | Herald Almanack |
| Trimmer | A. | Farmer & Sheepowner | Gordon River | 1885 | Herald Almanack |
| Trimmer | Mrs. | - | Albany | 1880 | WA Almanack |
| Trimmer | Mrs. | - | Albany | 1881 | WA Almanack |
| Trimmer | Mrs. | - | Albany | 1882 | WA Almanack |
| Trimmer | Mrs. | - | Albany | 1884 | WA Almanack |
| Trimmer | Mrs. | - | Albany | 1885 | Herald Almanack |
| Trimmings | Wm. | Blacksmith | Wellington (Blackwood Road) (Lockerville) | 1880 | WA Almanack |
| Trimmings | Wm. | Blacksmith | Wellington District (Blackwood River) (Lockeville) | 1881 | WA Almanack |
| Trinity Church | | | First Floor, Commercial Buildings, Saint George's Terrace, Perth | 1897 | Witton's Directory |
| Trinsella | Jas. | Carter | Busselton, Blackwood &c. (Quindalup) | 1882 | WA Almanack |
| Trinsella | Jas. | Carter | Busselton, Blackwood &c. (Quinalup) | 1884 | WA Almanack |
| Trinsella | Thomas | Carter | Busselton, Blackwood &c. (Quindalup) | 1882 | WA Almanack |
| Trinsella | Thos. | Carter | Busselton, Blackwood &c. (Quinalup) | 1884 | WA Almanack |
| Trisidder | J. | Miner | Northampton | 1885 | Herald Almanack |
| Trogoning | W. P. | Freemason H1. | Albany | 1865 | WA Almanack |
| Tron | Adam | Bootmaker | Southern Cross | 1897 | Witton's Directory |
| Troode | E. | 1st Clerk of Customs | Fremantle | 1872 | WA Almanack |
