| Official Name: | Northfield, Massachusetts |
| Settlement Type: | Census-designated place |
| Pushpin Label: | Northfield |
| Pushpin Label Position: | bottom |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Massachusetts |
| Subdivision Type2: | County |
| Subdivision Name2: | Franklin |
| Subdivision Type3: | Town |
| Subdivision Name3: | Northfield |
| Area Footnotes: | [1] |
| Area Total Km2: | 11.58 |
| Area Land Km2: | 11.53 |
| Area Water Km2: | 0.05 |
| Area Total Sq Mi: | 4.47 |
| Area Land Sq Mi: | 4.45 |
| Area Water Sq Mi: | 0.02 |
| Population As Of: | 2020 |
| Population Total: | 1051 |
| Population Density Km2: | 91.12 |
| Population Density Sq Mi: | 236.02 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 292 |
| Coordinates: | 42.7044°N -72.4442°W |
| Postal Code Type: | ZIP codes |
| Postal Code: | 01354, 01360 |
| Area Code: | 413 |
| Blank Name: | FIPS code |
| Blank Info: | 25-47800 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 0609322 |
| Unit Pref: | Imperial |
Northfield is a census-designated place (CDP) in the town of Northfield in Franklin County, Massachusetts, United States. The population was 1,089 at the 2010 census.[2] It is part of the Springfield, Massachusetts Metropolitan Statistical Area. It is also home to the former Northfield campus of Northfield Mount Hermon School.
According to the United States Census Bureau, the CDP has a total area of 11.6 km (4.5 mi), of which 11.6 km (4.5 mi) is land and 0.22% is water.
As of the census[3] of 2000, there were 1,141 people, 495 households, and 307 families residing in the CDP. The population density was 98.6/km (255.3/mi). There were 567 housing units at an average density of 49.0/km (126.9/mi). The racial makeup of the CDP was 97.90% White, 0.09% Black or African American, 0.53% Native American, 0.26% Asian, and 1.23% from two or more races. Hispanic or Latino of any race were 0.79% of the population.
There were 495 households, out of which 28.5% had children under the age of 18 living with them, 49.9% were married couples living together, 9.5% had a female householder with no husband present, and 37.8% were non-families. 34.1% of all households were made up of individuals, and 14.3% had someone living alone who was 65 years of age or older. The average household size was 2.31 and the average family size was 2.98.
In the CDP, the population was spread out, with 24.0% under the age of 18, 6.7% from 18 to 24, 23.7% from 25 to 44, 29.4% from 45 to 64, and 16.3% who were 65 years of age or older. The median age was 43 years. For every 100 females, there were 85.5 males. For every 100 females age 18 and over, there were 80.2 males.
The median income for a household in the CDP was $45,580, and the median income for a family was $56,146. Males had a median income of $41,603 versus $27,308 for females. The per capita income for the CDP was $23,920. About 1.0% of families and 3.9% of the population were below the poverty line, including 3.0% of those under age 18 and 9.4% of those age 65 or over.