| Official Name: | Jefferson Valley-Yorktown, New York |
| Settlement Type: | Census-designated place |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | New York |
| Subdivision Type2: | County |
| Subdivision Name2: | Westchester |
| Subdivision Type3: | Town |
| Subdivision Name3: | Yorktown |
| Area Footnotes: | [1] |
| Area Total Km2: | 18.27 |
| Area Land Km2: | 18.02 |
| Area Water Km2: | 0.25 |
| Area Total Sq Mi: | 7.05 |
| Area Land Sq Mi: | 6.96 |
| Area Water Sq Mi: | 0.10 |
| Population As Of: | 2020 |
| Population Total: | 14444 |
| Population Density Km2: | 801.39 |
| Population Density Sq Mi: | 2075.59 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Coordinates: | 41.3169°N -73.8017°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 10535[2] |
| Area Code: | 914 |
| Blank Name: | FIPS code |
| Blank Info: | 36-38500 |
| Unit Pref: | Imperial |
Jefferson Valley-Yorktown, commonly known as Jefferson Valley, is a census-designated place (CDP) located in the town of Yorktown in Westchester County, New York, United States. The population was 14,142 at the 2010 census.[3] It is a hot spot for local shoppers, due to its Jefferson Valley Mall.
The Jefferson Valley-Yorktown CDP is located at 41.3169°N -73.8017°W (41.316874, -73.801722).[4] The hamlet of Jefferson Valley is in the northeast part of the CDP, along U.S. Route 6, while the hamlet of Yorktown is in the south, at the junction of New York State Route 132 (Old Yorktown Road) with U.S. Route 202/State Route 35 (Crompond Road). The Taconic Parkway forms the western border of the CDP, while the Somers town line is the eastern border. The northern border follows the Westchester-Putnam County line.
According to the United States Census Bureau, the CDP has a total area of, of which is land and, or 1.14%, is water.
At the 2000 census there were 14,891 people, 5,420 households, and 4,151 families in the CDP. The population density was 2154.2sp=usNaNsp=us. There were 5,526 housing units at an average density of 799.4sp=usNaNsp=us. The racial makeup of the CDP was 92.31% White, 2.33% African American, 0.11% Native American, 3.22% Asian, 0.01% Pacific Islander, 1.06% from other races, and 0.96% from two or more races. Hispanic or Latino of any race were 4.69%.[5]
Of the 5,420 households 38.0% had children under the age of 18 living with them, 68.8% were married couples living together, 6.3% had a female householder with no husband present, and 23.4% were non-families. 21.4% of households were one person and 14.7% were one person aged 65 or older. The average household size was 2.74 and the average family size was 3.22.
The age distribution was 26.6% under the age of 18, 4.8% from 18 to 24, 26.7% from 25 to 44, 25.1% from 45 to 64, and 16.7% 65 or older. The median age was 41 years. For every 100 females, there were 89.4 males. For every 100 females age 18 and over, there were 85.1 males.
The median household income was $82,379 and the median family income was $96,089. Males had a median income of $65,585 versus $46,373 for females. The per capita income for the CDP was $34,347. About 1.4% of families and 2.5% of the population were below the poverty line, including 3.1% of those under age 18 and 4.3% of those age 65 or over.