| Official Name: | Marietta, New York |
| Pushpin Map: | New York |
| Pushpin Map Caption: | Location within the state of New York |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | New York |
| Subdivision Type2: | County |
| Subdivision Name2: | Onondaga |
| Leader Title: | Democracies |
| Leader Title1: | Jordan Wood |
| Unit Pref: | Imperial |
| Population As Of: | 2000 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Coordinates: | 42.9089°N -76.3233°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 13110 |
| Area Code: | 315 |
Marietta is a hamlet in Onondaga County, New York, United States, southwest of Syracuse. It is located between the Village of Marcellus and Otisco Lake.