| Official Name: | Marcy, New York |
| Settlement Type: | Census-designated place |
| Pushpin Map: | New York#USA |
| Pushpin Label: | Marcy |
| Coordinates: | 43.1381°N -75.2758°W |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | New York |
| Subdivision Type2: | County |
| Subdivision Name2: | Oneida |
| Subdivision Type3: | Town |
| Subdivision Name3: | Marcy |
| Area Footnotes: | [1] |
| Area Total Sq Mi: | 1.83 |
| Area Land Sq Mi: | 1.72 |
| Area Water Sq Mi: | 0.11 |
| Area Total Km2: | 4.74 |
| Area Land Km2: | 4.45 |
| Area Water Km2: | 0.29 |
| Population As Of: | 2020 |
| Population Density Km2: | 146.07 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 439 |
| Postal Code Type: | ZIP Code |
| Postal Code: | 13403 |
| Area Code: | 315/680 |
| Blank Name: | FIPS code |
| Blank Info: | 36-45524 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2806949 |
| Population Total: | 650 |
| Unit Pref: | Imperial |
| Population Density Sq Mi: | 378.35 |
Marcy is an unincorporated community and census-designated place (CDP) in the town of Marcy, Oneida County, New York, United States. It was first listed as a CDP prior to the 2020 census.
The CDP is in eastern Oneida County, in the southern part of the town of Marcy. It is 5miles northwest of Utica and 11miles southeast of Rome. The hamlet of Maynard is in the eastern part of the CDP. Interstate 90, the New York Thruway, passes through Marcy, but with no direct access. New York State Route 49, the Utica–Rome Expressway, runs the length of the community, with access from one exit in the center of the CDP, as well as exits at the eastern and western ends of the CDP. The Erie Canal forms the southern border of the community.