Frederick Tiedt (16 October 1935 – 15 June 1999, born in Dublin, Ireland) was an amateur and professional boxer.

Tiedt won a silver medal for Ireland at the 1956 Summer Olympics in Melbourne, Australia in the welterweight division.

Tiedt beat opponents from Poland, the United States, and Australia before losing a split decision to Nicolae Linca of Romania.

The following year Tiedt won a bronze medal at the European Amateur Boxing Championships in Prague.

[citation needed] Tiedt is the uncle of Liam Mooney, a former rugby player and now an entrepreneur living in Dubai.