Troy, IL Profile: Facts & Data


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Troy, Illinois - Basic Facts

The City of Troy had a population of 11,184 as of July 1, 2023. Troy ranks in the upper 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 Troy is located at latitude 38.7292 and longitude -89.8832 in Madison County. The formal boundaries for the City of Troy encompass a land area of 5.29 sq. miles and a water area of 0.06 sq. miles. Madison County is in the Central time zone (GMT -6).

The City of Troy 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 City of Troy is located within Township of Jarvis, a minor civil division (MCD) of Madison County.

Jump to... (On This Page!)
  1. Troy 2023 Demographic Data
  2. Growth Rates for Troy (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 - 2023 Demographics

Troy, IL Data & Demographics (As of July 1, 2023)


Total Population 11,184 (100%)
Population in Households 11,184 (100.0%)
Population in Families 9,547 (85.4%)
Population in Group Quarters1 0
Population Density 1,990
Diversity Index2 28


Median Household Income $80,402
Average Household Income $110,285
% of Income for Mortgage4 15%
Per Capita Income $42,856
Wealth Index5 110
Socioeconomic Status Index6 Moderate (58.3)


Total HU (Housing Units) 4,582 (100%)
Owner Occupied HU 3,378 (73.7%)
Renter Occupied HU 968 (21.1%)
Vacant Housing Units 236 ( 5.2%)
Median Home Value $200,532
Average Home Value $245,530
Housing Affordability Index3 137


Total Households 4,346
Average Household Size 2.57
Family Households 3,123
Average Family Size 3.00
  1. Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
  2. 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 races 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.
  3. The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
  4. The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
  5. The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.
  6. The Socioeconomic Index ranges from zero (lowest relative status) to 100 (highest relative status). This measure quantifies disparities in social position of an area's inhabitants and is built from a broad range of demographic, housing, and socioeconomic inputs. More information on this measure can be found in Esri's SEI tutorial.


2020-2023 2023-2028
Population 0.62% -0.01%
Households 0.28% 0.13%
Families   0.29%
Median Household Income   2.75%
Per Capita Income   2.77%
Owner Occupied HU   0.57%

Troy, IL - Peer Comparisons by Rank and Percentile

The table below compares Troy to the other 1,464 incorporated cities, towns and CDPs in Illinois by rank and percentile using July 1, 2023 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 # 207 86th
Population Density # 247 83rd
Median Household Income # 383 74th
Housing Affordability Index # 690 47th
Per Capita Income # 353 76th
Diversity Index # 540 63rd

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

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