The City of O'Fallon had a population of 30,261 as of July 1, 2018. OFallon ranks in the upper quartile for Population Density and 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 OFallon is located at latitude 38.6 and longitude -89.9155 in St. Clair County. The formal boundaries for the City of O'Fallon (see map below) encompass a land area of 14.85 sq. miles and a water area of 0.12 sq. miles. St. Clair County is in the Central time zone (GMT -6). The elevation is 548 feet.
The City of O'Fallon (GNIS ID: 2395302) 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.
Beneath the boundary map are tables with OFallon population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2018.
|Population in Households||30,223|
|Population in Familes||25,724|
|Population in Group Qrtrs||38|
|Median Household Income||$82,009|
|Average Household Income||$102,952|
|Per Capita Income||$39,785|
|Total Housing Units||12,010 (100%)|
|Owner Occupied HU||7,693 (64.1%)|
|Renter Occupied HU||3,743 (31.2%)|
|Vacant Housing Units||574 ( 4.8%)|
|Median Home Value||$197,988|
|Average Home Value||$238,887|
|Average Household Size||2.64|
|Average Family Size||3|
GROWTH RATE / YEAR
|Median Household Income||1.62%|
|Per Capita Income||2.2%|
The table below compares OFallon to the other 1,368 incorporated cities, towns and CDPs in Illinois by rank and percentile using July 1, 2018 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.
|Total Population||# 66||95th|
|Population Density||# 266||81st|
|Diversity Index||# 217||84th|
|Median Household Income||# 162||88th|
|Per Capita Income||# 155||89th|
Additional comparisons and rankings can be made with a VERY EASY TO USE Illinois Census Data Comparison Tool.