Ashtabula 1840 Census Index T
Extracted and Transcribed by Carol Page Tilson
| Surname | First Name | Township |
| TAFT | EBENEZER | Kingsville |
| TAFT | IRA | Kingsville |
| TASSETT | HERNY | Ashtabula Borough |
| TAYLER | ASA | Saybrook |
| TAYLOR | ALEXANDER | Kingsville |
| TAYLOR | HUBBARD | Saybrook |
| TAYLOR | JERUSHA | Conneant |
| TAYLOR | PHILELUS | Kingsville |
| TAYLOR | PHILIP T. | Rome |
| TAYLOR | SEBASTIAN F. | Conneant |
| TEAGER | MARTIN B. | Pierpont |
| TEALL | WILLIAM | Ashtabula Borough |
| TENANT | JOHN R. | Geneva |
| TENKER | POLLY | Rome |
| TERNEY | THOMAS | Austinburg |
| THAYER | ANDREW | Conneant |
| THAYER | CALVIN | Ashtabula |
| THAYER | DARLING | Conneant |
| THAYER | ELIJAH | Williamsfield |
| THAYER | GERHOM A. | Ashtabula |
| THAYER | JACOB | Conneant |
| THAYER | JAMES | Lenox |
| THAYER | JOHN | Conneant |
| THAYER | LEWIS | Conneant |
| THAYER | LUKE | Conneant |
| THAYER | NATHAN | Ashtabula |
| THAYLOR | ISRAEL G. | Ashtabula |
| THERBUR | AMOS | Trumbull |
| THOMAS | CALEB | Windsor |
| THOMAS | CALEB | Windsor |
| THOMAS | JOEL H. | Ashtabula |
| THOMAS | JOHN | Windsor |
| THOMAS | MARSHALL | Pierpont |
| THOMAS | WILLIAM | Windsor |
| THOMPSON | AMOS | Conneant |
| THOMPSON | APOLLOS | Conneant |
| THOMPSON | ASAHEL | Conneant |
| THOMPSON | CHRISTOPHER P. | Conneant |
| THOMPSON | ERASTUS G. | Andover |
| THOMPSON | GEORGE | Conneant |
| THOMPSON | HAMILTON | Millsford |
| THOMPSON | HORATIO | Trumbull |
| THOMPSON | JONATHAN | Monroe |
| THOMPSON | JOSHUA | Ashtabula Borough |
| THOMPSON | L.* | Conneant |
| THOMPSON | LAVINA | Conneant |
| THOMPSON | LEVI | Trumbull |
| THOMPSON | NATHAN | Geneva |
| THOMPSON | NORMAN | Shefield |
| THOMPSON | ROBERT | Conneant |
| THOMPSON | ROGER | Lenox |
| THOMPSON | RUFUS | Lenox |
| THOMPSON | SETH | Conneant |
| THOMPSON | WHIPPLE | Trumbull |
| THOMPSON | WILLIAM | Monroe |
| THOMPSON | WILLIAM | Colebrook |
| THOMPSON | ZEBEDIAH | Conneant |
| THOMS | CALEB | Windsor |
| THOPR | DENNIS | Geneva |
| THORNDELL | WILLIAM | Conneant |
| THORNTON | DEXTER | Kingsville |
| THORNTON | ISAAC M. | Monroe |
| THROPP | JAMES | Jefferson |
| THURBER | ENOS | Conneant |
| THURBER | FRANKLIN | Trumbull |
| THURBER | HENRY B. | Conneant |
| THURBER | HORATIO G. | Conneant |
| THURSTER | LYMAN | Monroe |
| THYAER | GALEN | Conneant |
| TICKNER | WALTER | Jefferson |
| TIDD | MARTIN | Williamsfield |
| TIFFANY | CURTISS | Shefield |
| TINAN | JOSEPH | Rome |
| TINKER | CHAUNCEY | Kingsville |
| TINKER | SILAS | Kingsville |
| TINKER | SYLVESTER | Kingsville |
| TITUS | ANSON | Kingsville |
| TOBIAS | AZEM | Andover |
| TOBIAS | JASON | Andover |
| TOBINSON | DELIA | Conneant |
| TODD | AUGUSTUS | Conneant |
| TODD | ERASTUS | Kingsville |
| TOD | AMOS | Geneva |
| TOMPKINS | ARNOLD B. | Harpersfield |
| TORRCY | JOSEPH | Monroe |
| TORREY | SEYMOUR | Monroe |
| TORREY | SHEMAN | Monroe |
| TOUBLERAN | MICHAEL | Windsor |
| TOUYCE | CYRUS W. | Williamsfield |
| TOUYCE | VALENTINE | Williamsfield |
| TOWEGEE | THOMAS J.* | Williamsfield |
| TOWER | MASON | Harpersfield |
| TOWER | REUBEN | Ashtabula Borough |
| TRACK | HENRY | Conneant |
| TRACY | JONATHAN | Morgan |
| TREAT | ROWLAND A. | Colebrook |
| TREAT | SYLVESTER | Colebrook |
| TRIMMER | CHESTER | Pierpont |
| TRIMMER | FRANCIS | Pierpont |
| TRIMMER | ISAIAH | Pierpont |
| TRIPP | ADMIRAL | Conneant |
| TRIP | THOMAS | Windsor |
| TRISBY | SALLY | Harpersfield |
| TROOP | HENRY | Geneva |
| TROOP | JOSEPH | Geneva |
| TROP | HOLDEN A. | Windsor |
| TROWBRIDGE | STEPHEN | Saybrook |
| TRUMBULL | RENSALAU* | Colebrook |
| TUBBS | JAMES* | Conneant |
| TUCKERMAN | ISAAC | Orwell |
| TUCKER | JAMES | Jefferson |
| TULLER | WESTEL | Monroe |
| TURNER | ALLISON | Ashtabula Borough |
| TURNER | ASAPH | Geneva |
| TURNER | CALVIN | Richmond |
| TURNER | CARNER | Pierpont |
| TURNER | GEORGE | Geneva |
| TURNER | HEZEKIAH | Richmond |
| TURNER | JAMES W. | Williamsfield |
| TURNER | JAMES | Saybrook |
| TURNER | JEPHTHA* | Pierpont |
| TURNER | JOHN | Windsor |
| TURNER | LEON 2ND | Richmond |
| TURNER | LEON | Pierpont |
| TURNER | NEHEMIAH | Pierpont |
| TURNER | POLLY | Pierpont |
| TURNER | WARREN | Windsor |
| TURNER | WILLIAM | Pierpont |
| TUTTLE | BRADFORD | Austinburg |
| TUTTLE | DANIEL | Harpersfield |
| TUTTLE | DANIEL | Windsor |
| TUTTLE | DANIEL | Windsor |
| TUTTLE | EBIN N. | Morgan |
| TUTTLE | ERIE | Colebrook |
| TUTTLE | HARVEY | Cherry Valley |
| TUTTLE | HORACE | Lenox |
| TUTTLE | IRA | Austinburg |
| TUTTLE | JONATHAN | Williamsfield |
| TUTTLE | RUSSELL | Geneva |
| TUTTLE | SAMUEL | Williamsfield |
| TUTTLE | THEOPHILUS | Williamsfield |
| TUTTLE | WILLAM | Geneva |
| TWITCHELL | AMOS | Andover |
| TWITCHELL | DAVID | Andover |
| TYLER | AMASA | Saybrook |
| TYLER | AMOS | Cherry Valley |
| TYLER | ANDREW E. | Morgan |
| TYLER | GEORGE W. | Saybrook |
| TYLER | RICHARD H. | Saybrook |