Muddy Creek is a 15.7adj=midNaNadj=mid[1] tributary of the Conestoga River in Lancaster County, Pennsylvania, in the United States.
The tributary Little Muddy Creek joins Muddy Creek from the Conestoga River.[1] Muddy Creek joins the Conestoga River upstream from Brownstown.[1]
Muddy Creek was formerly spanned by the Red Run Covered Bridge.