Swansea, IL Profile: Facts & Data


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Swansea, Illinois - Basic Facts

The Village of Swansea had a population of 14,222 as of July 1, 2018. Swansea ranks in the upper quartile for Population Density and Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in Illinois. See peer rankings below.

The primary coordinate point for Swansea is located at latitude 38.5339 and longitude -89.989 in St. Clair County. The formal boundaries for the Village of Swansea encompass a land area of 6.29 sq. miles and a water area of 0.15 sq. miles. St. Clair County is in the Central time zone (GMT -6). The elevation is 545 feet.

The Village of Swansea (GNIS ID: 2399939) has a C1 Census Class Code which indicates an active incorporated place that does not serve as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

The Village of Swansea is located within Township of Saint Clair, a minor civil division (MCD) of St. Clair County.

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  1. Swansea 2018 Demographic Data
  2. Growth Rates for Swansea (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. Illinois Research Tools (Easy Tools & Current Data)
  3. Illinois Data Comparison Tool - 2018 Demographics

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Swansea, IL Data & Demographics (As of July 1, 2018)


Total Population 14,222
Population in Households 13,831
Population in Familes 11,301
Population in Group Qrtrs 391
Population Density2 2,260
Diversity Index3 41


Median Household Income $66,144
Average Household Income $90,700
Per Capita Income $37,840


Total Housing Units 5,995 (100%)
Owner Occupied HU 4,150 (69.2%)
Renter Occupied HU 1,561 (26.0%)
Vacant Housing Units 284 ( 4.7%)
Median Home Value $166,059
Average Home Value $201,705


Total Households 5,711
Average Household Size 2.42
Family Households 3,712
Average Family Size 3
  1. Demographics are point estimates for July 1st of the current year and each for the forecast years. See References for more information.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2018 2018-2023
Population 0.61% 0.04%
Households 0.68% 0.07%
Families 0.48% -0.03%
Median Household Income   1.67%
Per Capita Income   1.81%

Swansea, IL - Peer Comparisons by Rank and Percentile

The table below compares Swansea to the other 1,368 incorporated cities, towns and CDPs in Illinois by rank and percentile using July 1, 2018 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 169 88th
Population Density # 213 85th
Diversity Index # 244 82nd
Median Household Income # 336 76th
Per Capita Income # 183 87th

Additional comparisons and rankings can be made with a VERY EASY TO USE Illinois Census Data Comparison Tool.

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