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Williamstown, KS Profile: Facts & Data

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Williamstown, Kansas - Basic Facts

The Williamstown CDP(1) had a population of 95 as of July 1, 2025.

The primary coordinate point for Williamstown is located at latitude 39.0628 and longitude -95.3327 in Jefferson County. Jefferson County is in the Central time zone (GMT -6).

It also has a Functional Status Code of ""

The Williamstown Census Designated Place is located within Township of Rural, a minor civil division (MCD) of Jefferson County.


  1. A Census Designated Place (CDP) is a statistical counterpart to a self-governing (incorporated) place such as a city, town, or village. A CDP is not a legal entity and has no governmental functions.

Jump to... (On This Page!)
  1. Williamstown 2025 Demographic Data
  2. Growth Rates for Williamstown (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. Kansas Research Tools (Easy Tools & Current Data)
  3. Kansas Data Comparison Tool - 2025 Demographics
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Williamstown, KS Data & Demographics (As of July 1, 2025)

POPULATION

Total Population 95 (100%)
Population in Households 95 (100.0%)
Population in Families 81 (85.3%)
Population in Group Quarters1 0
Population Density 813
Diversity Index2 26
 
 

INCOME

Median Household Income $77,582
Average Household Income $94,770
% of Income for Mortgage4 0%
Per Capita Income $35,913
Wealth Index5 72
Socioeconomic Status Index6 High (75.1)
 

HOUSING

Total HU (Housing Units) 36 (100%)
Owner Occupied HU 32 (88.9%)
Renter Occupied HU 4 (11.1%)
Vacant Housing Units 0
Median Home Value $250,000
Average Home Value $307,422
Housing Affordability Index3 0
 

HOUSEHOLDS

Total Households 36
Average Household Size 2.64
Family Households 26
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 -0.20% -0.42%
Households 0.00% 0.00%
Families   2.21%
Median Household Income   -1.41%
Per Capita Income   -0.04%
Owner Occupied HU   -1.28%

Williamstown, KS - Peer Comparisons by Rank and Percentile

The table below compares Williamstown to the other 740 incorporated cities, towns and CDPs in Kansas 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 # 551 26th
Population Density # 295 60th
Median Household Income # 204 73rd
Housing Affordability Index # 129 17th
Per Capita Income # 330 56th
Diversity Index # 323 56th

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

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