| Official Name: | Glenfield, New York |
| Pushpin Map: | New York#USA |
| Pushpin Label: | Glenfield |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | New York |
| Subdivision Type2: | County |
| Subdivision Name2: | Lewis |
| Subdivision Type3: | Town |
| Subdivision Name3: | Martinsburg |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 768 |
| Coordinates: | 43.7103°N -75.4022°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 13343 |
| Area Code: | 315 & 680 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 951212 |
Glenfield is a hamlet in the town of Martinsburg, Lewis County, New York, United States. The community is located in the southeast corner of Martinsburg, along the Black River and New York State Route 12, 7miles southeast of Lowville. Glenfield has a post office with ZIP code 13343, which opened on March 3, 1855.[1] [2]