Fairfax, SD Profile: Facts & Data


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Fairfax, South Dakota - Basic Facts

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The Town of Fairfax had a population of 106 as of July 1, 2021. Fairfax ranks in the upper quartile for Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in South Dakota. See peer rankings below.

The primary coordinate point for Fairfax is located at latitude 43.0275 and longitude -98.8884 in Gregory County. The formal boundaries for the Town of Fairfax encompass a land area of 0.3 sq. miles and a water area of 0 sq. miles. Gregory County is in the Central time zone (GMT -6). The elevation is 1,949 feet.

The Town of Fairfax 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.

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  1. Fairfax 2021 Demographic Data
  2. Growth Rates for Fairfax (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. South Dakota Research Tools (Easy Tools & Current Data)
  3. South Dakota Data Comparison Tool - 2021 Demographics

Fairfax, SD Data & Demographics (As of July 1, 2021)


Total Population 106 (100%)
Population in Households 106 (100.0%)
Population in Families 85 (80.2%)
Population in Group Quarters1 0
Population Density 350
Diversity Index2 36


Median Household Income $45,336
Average Household Income $64,848
% of Income for Mortgage4 0%
Per Capita Income $29,574
Wealth Index5 59


Total HU (Housing Units) 81 (100%)
Owner Occupied HU 42 (51.9%)
Renter Occupied HU 16 (19.8%)
Vacant Housing Units 22 (27.2%)
Median Home Value $81,818
Average Home Value $98,295
Housing Affordability Index3 0


Total Households 59
Average Household Size 1.8
Family Households 37
Average Family Size 2
  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.


2010-2021 2021-2026
Population -0.72% -0.77%
Households -0.58% -0.69%
Families 1.02% -0.55%
Median Household Income   3.95%
Per Capita Income   2.63%
Owner Occupied HU   0.47%

Fairfax, SD - Peer Comparisons by Rank and Percentile

The table below compares Fairfax to the other 393 incorporated cities, towns and CDPs in South Dakota by rank and percentile using July 1, 2021 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 # 284 28th
Population Density # 228 42nd
Median Household Income # 333 16th
Housing Affordability Index # 94 24th
Per Capita Income # 246 38th
Diversity Index # 62 84th

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

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