Tobias Stieler (born 2 July 1981) is a German football referee. He referees for SG Rosenhöhe of the Hessian Football Association. He is a FIFA-listed referee.
Stieler has been a DFB referee since 2004, a Bundesliga referee since 2012, and a FIFA referee since 2014.
On 2nd October 2025 he officiated at a Europa League match between Celtic and Braga in Glasgow and disallowed a crucial equalizer by home club Celtic after a two-minute VAR review "despite no handball being evident on television replays."
Stieler lives in Sölden near Freiburg im Breisgau and works as lawyer.