The statement from incoming interim party leader, Donna Brazile, and six other officials says the comments in the emails "do not reflect the values of the DNC or our steadfast commitment to neutrality during the nominating process."
The statement says the party won't tolerate disrespectful language.
The statement wasn't signed by the outgoing DNC head, Debbie Wasserman Schultz.
She announced on Sunday that she'd step down from that job at the end of this week's Democratic National Convention in Philadelphia.
The emails suggested party officials favored Clinton over rival Sanders during the primaries.
To get alerts for breaking news, download the abc13 news app for iPhone or Android. You can also get breaking news alerts sent to you by email.