Illinois / Census place 1776199

Troy

A Census profile of the people, homes, and daily patterns that shape this place.

Official Census name: Troy city

At a glance

A city in numbers.

Population
11,893
2025 estimate
Annual change
+0.7%
Population estimate
Density
1,902/sq mi
6.3 sq mi land area
Median age
35.2 years
ACS 5-year estimate

Living here

The everyday equation.

Households, homes, education, and the time it takes to get around.

Median household income
$112,434
Median home value
$268,000
Median gross rent
$1,116
Bachelor’s degree or higher
45.2%
Typical commute
25.7 min
Public transit commute
0.2%

Climate normals

The long view of weather.

Thirty-year averages, not a forecast. Temperature and precipitation describe the typical conditions recorded from 1991 through 2020.

Representative station: BELLEVILLE SIU RSCH (14 mi from place center)
Average high
68.9°F
Average low
46.4°F
Annual rainfall
43.4"
Annual snowfall
11.2"

Month by month

A year in Troy.

Typical high and low °F
JFMAMJJASOND
Typical precipitation inches
J
F
M
A
M
J
J
A
S
O
N
D

Data vintage

Population is from the 2025 Population Estimates Program. Household, housing, education, and commute data are from the 2020-2024 American Community Survey 5-year release.

Similar places

More places to consider.

Selected by the closest mix of population, density, median home value, and average annual high.

TN

Red Bank, TN

Population, housing, work, and travel data for this Census place.

Population
12,405
Median home
$269,400
OR

Ontario, OR

Population, housing, work, and travel data for this Census place.

Population
11,957
Median home
$236,300
WA

Grandview, WA

Population, housing, work, and travel data for this Census place.

Population
12,062
Median home
$265,300

Keep exploring

Compare Troy with Red Bank