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Harrisburg, IL Profile: Facts & Data

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Harrisburg, Illinois - Basic Facts

The City of Harrisburg had a population of 7,729 as of July 1, 2025.

The primary coordinate point for Harrisburg is located at latitude 37.7384 and longitude -88.5406 in Saline County. The formal boundaries for the City of Harrisburg encompass a land area of 6.57 sq. miles and a water area of 0.2 sq. miles. Saline County is in the Central time zone (GMT -6).

The City of Harrisburg 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 Harrisburg is located within Township of Harrisburg, a minor civil division (MCD) of Saline County.


Jump to... (On This Page!)
  1. Harrisburg 2025 Demographic Data
  2. Growth Rates for Harrisburg (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 - 2025 Demographics
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Harrisburg, IL Data & Demographics (As of July 1, 2025)

POPULATION

Total Population 7,729 (100%)
Population in Households 7,347 (95.1%)
Population in Families 5,209 (67.4%)
Population in Group Quarters1 382 ( 4.9%)
Population Density 1,169
Diversity Index2 31
 
 

INCOME

Median Household Income $47,939
Average Household Income $68,947
% of Income for Mortgage4 12%
Per Capita Income $31,081
Wealth Index5 47
Socioeconomic Status Index6 Low (41.3)
 

HOUSING

Total HU (Housing Units) 4,114 (100%)
Owner Occupied HU 2,226 (54.1%)
Renter Occupied HU 1,251 (30.4%)
Vacant Housing Units 637 (15.5%)
Median Home Value $93,778
Average Home Value $128,630
Housing Affordability Index3 157
 

HOUSEHOLDS

Total Households 3,477
Average Household Size 2.11
Family Households 1,796
Average Family Size 3.00
NOTES
  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.

GROWTH RATE / YEAR

 2020-2025 2025-2030
Population -1.16% -0.79%
Households -0.58% -0.41%
Families   -0.61%
Median Household Income   2.49%
Per Capita Income   1.94%
Owner Occupied HU   0.12%

Harrisburg, IL - Peer Comparisons by Rank and Percentile

The table below compares Harrisburg to the other 1,461 incorporated cities, towns and CDPs in Illinois by rank and percentile using July 1, 2025 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 # 268 82nd
Population Density # 579 60th
Median Household Income # 1391 5th
Housing Affordability Index # 1033 71st
Per Capita Income # 1238 15th
Diversity Index # 523 64th

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

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