Grantfork, IL Profile: Facts & Data

Grantfork, Illinois - Basic Facts

The Village of Grantfork had a population of 352 as of July 1, 2025.

The primary coordinate point for Grantfork is located at latitude 38.83 and longitude -89.6656 in Madison County. The formal boundaries for the Village of Grantfork encompass a land area of 0.3 sq. miles and a water area of 0.01 sq. miles. Madison County is in the Central time zone (GMT -6).

The Village of Grantfork 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 Grantfork is located within Township of Leef, a minor civil division (MCD) of Madison County.

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Grantfork, IL Data & Demographics (As of July 1, 2025)

POPULATION
Total Population	352 (100%)
Population in Households	352 (100.0%)
Population in Families	306 (86.9%)
Population in Group Quarters¹	0
Population Density	957
Diversity Index²	18


INCOME
Median Household Income	$125,974
Average Household Income	$153,968
% of Income for Mortgage⁴	15%
Per Capita Income	$60,800
Wealth Index⁵	152
Socioeconomic Status Index⁶	Moderate (62.9)

HOUSING
Total HU (Housing Units)	152 (100%)
Owner Occupied HU	130 (85.5%)
Renter Occupied HU	9 ( 5.9%)
Vacant Housing Units	13 ( 8.6%)
Median Home Value	$300,000
Average Home Value	$360,769
Housing Affordability Index³	135

HOUSEHOLDS
Total Households	139
Average Household Size	2.53
Family Households	99
Average Family Size	3.00

HOUSING

Total HU (Housing Units)

152 (100%)

Owner Occupied HU

130 (85.5%)

Renter Occupied HU

9 ( 5.9%)

Vacant Housing Units

13 ( 8.6%)

Median Home Value

$300,000

Average Home Value

$360,769

Housing Affordability Index³

135

HOUSEHOLDS

Total Households

139

Average Household Size

2.53

Family Households

Average Family Size

3.00

NOTES

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.
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.
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.
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).
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.
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	0.61%	-0.23%
Households	1.14%	0.29%
Families		2.13%
Median Household Income		2.57%
Per Capita Income		2.10%
Owner Occupied HU		0.46%

GROWTH RATE / YEAR

2020-2025

2025-2030

Population

0.61%

-0.23%

Households

1.14%

0.29%

Families

2.13%

Median Household Income

2.57%

Per Capita Income

2.10%

Owner Occupied HU

0.46%

Grantfork, IL - Peer Comparisons by Rank and Percentile

The table below compares Grantfork 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	# 1012	31st
Population Density	# 716	51st
Median Household Income	# 111	92nd
Housing Affordability Index	# 824	56th
Per Capita Income	# 115	92nd
Diversity Index	# 904	38th

Variable Description

Rank

Percentile

Total Population

# 1012

31st

Population Density

# 716

51st

Median Household Income

# 111

92nd

Housing Affordability Index

# 824

56th

Per Capita Income

# 115

92nd

Diversity Index

# 904

38th

Illinois Census Data Comparison Tool

Grantfork, IL Profile: Facts & Data

Grantfork, Illinois - Basic Facts

Grantfork, IL Data & Demographics (As of July 1, 2025)

POPULATION

INCOME

HOUSING

HOUSEHOLDS

GROWTH RATE / YEAR

Grantfork, IL - Peer Comparisons by Rank and Percentile

Grantfork, IL - Most Popular Things to Do

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