Buffalo, IL Profile: Facts, Map & Data


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Buffalo, Illinois - Basic Facts

The Village of Buffalo had a population of 553 as of July 1, 2017. Buffalo ranks in the lower quartile for Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in Illinois. See peer rankings below.

The primary coordinate point for Buffalo is located at latitude 39.8499 and longitude -89.4089 in Sangamon County. The formal boundaries for the Village of Buffalo (see map below) encompass a land area of 0.37 sq. miles and a water area of 0 sq. miles. Sangamon County is in the Central time zone (GMT -6). The elevation is 614 feet.

The Village of Buffalo (GNIS ID: 2397489) 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 Buffalo is located within Township of Mechanicsburg, a minor civil division (MCD) of Sangamon County.

Beneath the boundary map are tables with Buffalo population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2017.

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Village of Buffalo, IL Boundary Map

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Boundary Maps: Township of Mechanicsburg | Sangamon County | Illinois Counties

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Buffalo, IL Data & Demographics (As of July 1, 2017)


Total Population 553
Daytime Population: Workers 258
Daytime Population: Residents 265
Total Daytime Population (TDP) 523
Ratio TDP/Total Population1 0.95
Population in Households 553
Population in Familes 460
Population in Group Qrtrs 0
Population Density2 1,513
Diversity Index3 6


Median Household Income $66,673
Average Household Income $81,621
Per Capita Income $32,716


Total Housing Units 239 (100%)
Owner Occupied HU 186 (77.8%)
Renter Occupied HU 46 (19.2%)
Vacant Housing Units 8 ( 3.3%)
Median Home Value $144,643
Average Home Value $161,694


Total Households 231
Average Household Size 2.39
Family Households 164
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. 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 race 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.


2010-2017 2017-2022
Population 1.32% 0.89%
Households 1.39% 1.02%
Families 2.21% 0.84%
Median Household Income   2.78%
Per Capita Income   2.83%

Buffalo, IL - Peer Comparisons by Rank and Percentile

The table below compares Buffalo to the other 1,368 incorporated cities, towns and CDPs in Illinois by rank and percentile using July 1, 2017 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 # 898 34th
Population Density # 460 66th
Diversity Index # 1170 15th
Median Household Income # 298 78th
Per Capita Income # 294 79th

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

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