Williamston, MI Profile: Facts & Data

Williamston, Michigan - Basic Facts

The City of Williamston had a population of 3,745 as of July 1, 2025.

The primary coordinate point for Williamston is located at latitude 42.6889 and longitude -84.283 in Ingham County. The formal boundaries for the City of Williamston encompass a land area of 2.44 sq. miles and a water area of 0.12 sq. miles. Ingham County is in the Eastern time zone (GMT -5).

The City of Williamston has a C5 Census Class Code which indicates an active incorporated place that is independent of any county subdivision and serves as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

Jump to... (On This Page!)

Williamston, MI Data & Demographics (As of July 1, 2025)

POPULATION
Total Population	3,745 (100%)
Population in Households	3,745 (100.0%)
Population in Families	2,907 (77.6%)
Population in Group Quarters¹	0
Population Density	1,526
Diversity Index²	25


INCOME
Median Household Income	$88,294
Average Household Income	$117,533
% of Income for Mortgage⁴	23%
Per Capita Income	$53,761
Wealth Index⁵	110
Socioeconomic Status Index⁶	Moderate (61.8)

HOUSING
Total HU (Housing Units)	1,825 (100%)
Owner Occupied HU	1,272 (69.7%)
Renter Occupied HU	441 (24.2%)
Vacant Housing Units	112 ( 6.1%)
Median Home Value	$322,433
Average Home Value	$334,992
Housing Affordability Index³	90

HOUSEHOLDS
Total Households	1,713
Average Household Size	2.19
Family Households	989
Average Family Size	3.00

HOUSING

Total HU (Housing Units)

1,825 (100%)

Owner Occupied HU

1,272 (69.7%)

Renter Occupied HU

441 (24.2%)

Vacant Housing Units

112 ( 6.1%)

Median Home Value

$322,433

Average Home Value

$334,992

Housing Affordability Index³

HOUSEHOLDS

Total Households

1,713

Average Household Size

2.19

Family Households

989

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	-0.37%	-0.09%
Households	0.31%	0.35%
Families		1.70%
Median Household Income		2.13%
Per Capita Income		2.69%
Owner Occupied HU		0.73%

GROWTH RATE / YEAR

2020-2025

2025-2030

Population

-0.37%

-0.09%

Households

0.31%

0.35%

Families

1.70%

Median Household Income

2.13%

Per Capita Income

2.69%

Owner Occupied HU

0.73%

Williamston, MI - Peer Comparisons by Rank and Percentile

The table below compares Williamston to the other 745 incorporated cities, towns and CDPs in Michigan 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	# 215	71st
Population Density	# 196	74th
Median Household Income	# 109	86th
Housing Affordability Index	# 152	20th
Per Capita Income	# 88	88th
Diversity Index	# 345	54th

Variable Description

Rank

Percentile

Total Population

# 215

71st

Population Density

# 196

74th

Median Household Income

# 109

86th

Housing Affordability Index

# 152

20th

Per Capita Income

# 88

88th

Diversity Index

# 345

54th

Michigan Census Data Comparison Tool

Williamston, MI Profile: Facts & Data

Williamston, Michigan - Basic Facts

Williamston, MI Data & Demographics (As of July 1, 2025)

POPULATION

INCOME

HOUSING

HOUSEHOLDS

GROWTH RATE / YEAR

Williamston, MI - Peer Comparisons by Rank and Percentile

Williamston, MI - Most Popular Things to Do

Use HTL Address Research for a Michigan Address and get...

Quick & Easy Ways to...

Michigan Census Data Comparison Tool

Ingham County