| Cornelius Demarest House | |
| Location: | 12 Rochelle Avenue, Rochelle Park, New Jersey |
| Coordinates: | 40.8953°N -74.0786°W |
| Architect: | Demarest, Samuel |
| Added: | January 10, 1983 |
| Area: | less than one acre |
| Refnum: | 83001495 |
| 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: | October 3, 1980 |
| Designated Other1 Number: | 659[1] |
| Designated Other1 Num Position: | bottom |
| Designated Other1 Color: |
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Cornelius Demarest House is located in Rochelle Park, Bergen County, New Jersey, United States. The house was added to the National Register of Historic Places on January 10, 1983.