Samuel J. Plumeri Field at Mercer County Waterfront Park (sometimes referred to as simply Waterfront Park) is a baseball stadium in Trenton, New Jersey. It is home to the Trenton Thunder of the Eastern League. Official seating capacity is 6,341.

The park was built for the 1994 season, although it opened several weeks late due to a rough winter that hampered construction. The sod also was unable to take properly that season, and the field did not properly drain, leading to rainouts on evenings where the sun had been out since noon. The drainage problem was fixed in 1995.

While the outfield in left and center field is covered with advertising signs that obscure views of Route 29 and nearby houses, the right field fence was kept as a short structure so that fans could see the Delaware River and Pennsylvania beyond. The river is also an inviting target for left-handed sluggers, several of whom have deposited baseballs into the water. Similar to Great American Ball Park and its river border with Kentucky, Waterfront Park also holds the unique possibility of having someone "hit one out of the state" since the middle of the Delaware River is the border with Pennsylvania.

The stadium anchors an area of rejuvenation in Trenton that also includes office buildings, nightclubs, and the Sovereign Bank Arena, several blocks away, for ice hockey and basketball.