Thomas Mattias Poppler Isherwood (born 28 January 1998) is a Swedish professional footballer who plays as a centre-back for AIK.

Isherwood has played in Sweden, Germany and England for Brommapojkarna, Bayern Munich, Bradford City and Östersund.

[8] In June 2018 he signed a two-year contract with English Bradford City.

[14] On 26 August 2024, Isherwood signed a contract with AIK until 30 June 2025.

[15] Isherwood represented Sweden at youth international levels from under-17 to under-21.