The 20-year-old has joined the Blues on a one-month loan deal.
Birmingham have won just one of their opening seven matches in the Championship this season.
Lingard impressed for United during their pre-season tour of Australia and Japan.
Lingard spent time on loan at Leicester City last season.
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The start of the 2017-18 Premier League season is just around the corner and is shaping up to be one of the most competitive yet.
As always it is the so called “big clubs” that have splashed the most cash in the transfer window so far this summer. Manchester United or City? Arsenal or Tottenham? Who are the winners and losers of the transfer window so far?