| Official Name: | Spencer, Massachusetts |
| Settlement Type: | CDP |
| Mapsize: | 260px |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Massachusetts |
| Subdivision Type2: | County |
| Subdivision Name2: | Worcester |
| Area Footnotes: | [1] |
| Area Total Km2: | 5.63 |
| Area Land Km2: | 5.46 |
| Area Water Km2: | 0.16 |
| Area Total Sq Mi: | 2.17 |
| Area Land Sq Mi: | 2.11 |
| Area Water Sq Mi: | 0.06 |
| Population As Of: | 2020 |
| Population Total: | 5810 |
| Population Density Km2: | 1063.49 |
| Population Density Sq Mi: | 2754.86 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation M: | 261 |
| Elevation Ft: | 856 |
| Coordinates: | 42.2433°N -71.9944°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 01562 |
| Area Code: | 508 |
| Blank Name: | FIPS code |
| Blank Info: | 25-66070 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 0610417 |
| Unit Pref: | Imperial |
Spencer is a census-designated place (CDP) in the town of Spencer in Worcester County, Massachusetts, United States. The population was 5,700 at the 2010 census.
Spencer is located at (42.243276, -71.99437).[2]
According to the United States Census Bureau, the CDP has a total area of, of which is land and (2.74%) is water.
At the 2000 census,[3] there were 6,032 people, 2,554 households and 1,527 families residing in the CDP. The population density was . There were 2,722 housing units at an average density of . The racial make-up was 97.58% White, 0.61% Black or African American, 0.31% Native American, 0.28% Asian, 0.02% Pacific Islander, 0.41% from other races and 0.78% from two or more races. Hispanic or Latino of any race were 1.61% of the population.
There were 2,554 households, of which 29.8% had children under the age of 18 living with them, 42.8% were married couples living together, 12.5% had a female householder with no husband present and 40.2% were non-families. 33.0% of all households were made up of individuals, and 13.5% had someone living alone who was 65 years of age or older. The average household size was 2.35 and the average family size was 2.98.
24.4% of the population were under the age of 18, 9.9% from 18 to 24, 30.7% from 25 to 44, 20.9% from 45 to 64 and 14.1% were 65 years of age or older. The median age was 35 years. For every 100 females, there were 91.8 males. For every 100 females age 18 and over, there were 89.3 males.
The median household income was $35,206 and the median family income was $46,333. Males had a median income of $36,563 and females $25,738. The per capita income was $18,975. About 9.0% of families and 12.0% of the population were below the poverty line, including 16.6% of those under age 18 and 11.7% of those age 65 or over.