| Trenton and Mercer County War Memorial-Soldiers' and Sailors' Memorial Building | |
| Location: | West Lafayette Street, Trenton, New Jersey |
| Coordinates: | 40.2183°N -74.7683°W |
| Built: | 1930 |
| Architect: | Kaplan, Louis S. |
| Architecture: | Renaissance, Art Deco, Italian Renaissance Revival |
| Added: | December 11, 1986 |
| Refnum: | 86003480 |
| Designated Other1 Name: | New Jersey Register of Historic Places |
| Designated Other1 Abbr: | NJRHP |
| Designated Other1 Link: | New Jersey Register of Historic Places |
| Designated Other1 Date: | November 5, 1986 |
| Designated Other1 Number: | 1803[1] |
| Designated Other1 Num Position: | bottom |
| Designated Other1 Color: |
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Trenton and Mercer County War Memorial-Soldiers' and Sailors' Memorial Building, known as the Trenton War Memorial, is located in Trenton, Mercer County, New Jersey, United States. The building was built in 1930 and was added to the National Register of Historic Places on December 11, 1986. It was designed by Louis S. Kaplan (1896-1964), who as a young architect won a competition to design Trenton's memorial to its Dead from World War One. Kaplan then supervised the building of the War Memorial, and after its dedication became the leading architect in Trenton until the early 1960s. Built as a concert hall, it fell into disrepair before being restored by the State of New Jersey in the 1990s. It was rededicated in 1999. The 1,807-seat theater at the War Memorial was renamed the Patriots Theater in 2001.