Concordia is an unincorporated community and census-designated place (CDP) in Monroe Township, Middlesex County, New Jersey, United States. The CDP is oriented around the age restricted gated community of Concordia. As of the 2020 United States census, the CDP's population was 2,455, Prior to 2020, the corner of Concordia known as The Ponds was split off into its own CDP.
Geography
Concordia is in southern Middlesex County, in west-central Monroe Township. It is bordered to the north by Wittingham, to the southwest by The Ponds, and to the west by Clearbrook. Jamesburg, the closest borough, is to the north, while Hightstown is to the southwest.
According to the U.S. Census Bureau, the CDP has a total area of , including of land and of water (2.65%). 1960 1970<br> 1980 1990 2000<br> 2010 2020
!Pop 2010
!style="background-color: #ffffb3;" |Pop 2020
!% 2000
!% 2010
!style="background-color: #ffffb3;" |% 2020
|-
|White alone (NH)
|3,600
|2,937
|style='background: #ffffe6; |2,138
|98.41%
|94.99%
|style='background: #ffffe6; |87.09%
|-
|Black or African American alone (NH)
|19
|68
|style='background: #ffffe6; |80
|0.52%
|2.20%
|style='background: #ffffe6; |3.26%
|-
|Native American or Alaska Native alone (NH)
|0
|0
|style='background: #ffffe6; |0
|0.00%
|0.00%
|style='background: #ffffe6; |0.00%
|-
|Asian alone (NH)
|17
|34
|style='background: #ffffe6; |113
|0.46%
|1.10%
|style='background: #ffffe6; |4.60%
|-
|Native Hawaiian or Pacific Islander alone (NH)
|0
|0
|style='background: #ffffe6; |0
|0.00%
|0.00%
|style='background: #ffffe6; |0.00%
|-
|Other race alone (NH)
|2
|0
|style='background: #ffffe6; |6
|0.05%
|0.00%
|style='background: #ffffe6; |0.24%
|-
|Mixed race or Multiracial (NH)
|8
|9
|style='background: #ffffe6; |24
|0.22%
|0.29%
|style='background: #ffffe6; |0.98%
|-
|Hispanic or Latino (any race)
|12
|44
|style='background: #ffffe6; |94
|0.33%
|1.42%
|style='background: #ffffe6; |3.83%
|-
|Total
|3,658
|3,092
|style='background: #ffffe6; |2,455
|100.00%
|100.00%
|style='background: #ffffe6; |100.00%
|}
2020 census
As of the 2020 census, Concordia had a population of 2,455. The median age was 73.0 years. 0.7% of residents were under the age of 18 and 79.5% were 65 years of age or older. For every 100 females, there were 61.5 males, and for every 100 females age 18 and over there were 61.2 males.
100.0% of residents lived in urban areas, while 0.0% lived in rural areas.
There were 1,604 households, of which 0.9% had children under the age of 18 living in them. Of all households, 39.4% were married-couple households, 10.2% were households with a male householder and no spouse or partner present, and 47.2% were households with a female householder and no spouse or partner present. About 50.2% of all households were made up of individuals, and 44.2% had someone living alone who was 65 years of age or older.
There were 2,180 households, out of which 0.2% had children under the age of 18 living with them, 60.5% were married couples living together, 1.2% had a female householder with no husband present, and 38.0% were non-families. 35.4% of all households were made up of individuals, and 33.3% had someone living alone who was 65 years of age or older. The average household size was 1.68 and the average family size was 2.05.