| William Clark House | |
| Location: | 346 Mount Prospect Avenue, Newark, New Jersey |
| Coordinates: | 40.7639°N -74.1722°W |
| Built: | 1879 |
| Architect: | William Halsey Wood |
| Architecture: | Queen Anne |
| Added: | November 10, 1977 |
| Refnum: | 77000863 |
| 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: | May 27, 1977 |
| Designated Other1 Number: | 1226[1] |
| Designated Other1 Num Position: | bottom |
| Designated Other1 Color: |
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The William Clark House, also known as the North Ward Center, is located in Newark, Essex County, New Jersey, United States. The house was built in 1879 at a cost of $200,000 and was added to the National Register of Historic Places on November 10, 1977. The house is a 28-room Queen Anne style designed by William Halsey Wood. The house was built for William Clark of the Clark Thread Company.