Dorchester, IL Profile: Facts, Map & Data


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Dorchester, Illinois - Basic Facts

The Village of Dorchester had a population of 142 as of July 1, 2017. Dorchester ranks in the lower quartile for Population Density when compared to the other cities, towns and Census Designated Places (CDPs) in Illinois. See peer rankings below.

The primary coordinate point for Dorchester is located at latitude 39.0859 and longitude -89.8878 in Macoupin County. The formal boundaries for the Village of Dorchester (see map below) encompass a land area of 0.72 sq. miles and a water area of 0 sq. miles. Macoupin County is in the Central time zone (GMT -6). The elevation is 656 feet.

The Village of Dorchester (GNIS ID: 2398740) 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 Dorchester is located within Township of Gillespie, a minor civil division (MCD) of Macoupin County.

Beneath the boundary map are tables with Dorchester population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2017.

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Village of Dorchester, IL Boundary Map

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Boundary Maps: Township of Gillespie | Macoupin County | Illinois Counties

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Dorchester, IL Data & Demographics (As of July 1, 2017)


Total Population 142
Daytime Population: Workers 7
Daytime Population: Residents 75
Total Daytime Population (TDP) 82
Ratio TDP/Total Population1 0.58
Population in Households 142
Population in Familes 118
Population in Group Qrtrs 0
Population Density2 197
Diversity Index3 12


Median Household Income $52,057
Average Household Income $71,552
Per Capita Income $30,825


Total Housing Units 59 (100%)
Owner Occupied HU 46 (78.0%)
Renter Occupied HU 8 (13.6%)
Vacant Housing Units 4 ( 6.8%)
Median Home Value $103,125
Average Home Value $130,556


Total Households 55
Average Household Size 2.58
Family Households 38
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  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.


2010-2017 2017-2022
Population -0.84% -0.86%
Households -0.73% -1.12%
Families -2.89% -1.08%
Median Household Income   0.93%
Per Capita Income   2.82%

Dorchester, IL - Peer Comparisons by Rank and Percentile

The table below compares Dorchester to the other 1,368 incorporated cities, towns and CDPs in Illinois by rank and percentile using July 1, 2017 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 # 1271 7th
Population Density # 1280 7th
Diversity Index # 725 47th
Median Household Income # 739 46th
Per Capita Income # 380 72nd

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

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