The women reported being assaulted at the Band On The Wall on Swan Street in Manchester on 1 October.
Langley, 34, of Altrincham, pleaded guilty to two sexual assaults at Manchester Magistrates' Court and was told he may face a custodial sentence.
The actor, who played Todd Grimshaw for 16 years, left the ITV soap after an internal inquiry in October.
The court heard Langley had grabbed the crotch of one woman and touched the breasts and bottom of the other while drunk.
Prosecutor Karen Saffman said he had also sexually touched two other women, but had not faced charges over those assaults.
District Judge Mark Hadfield said he would consider a probation report, which was being prepared, before deciding if Langley would be sentenced at the court or be sent to Manchester Crown Court, where he could face a longer penalty.
The role, which he first took up in 2001, was Coronation Street's first openly gay character in its 57-year history.
He also appeared on two episodes of Doctor Who in 2005.
It is understood that Langley's contract with the show ended on 26 October following an inquiry.


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