Montgomery is a village in Kane and Kendall counties, Illinois, as well as a Chicago suburb. The population was 18,438 at the 2010 census, up from 5,471 at the 2000 census. As of 2017 the estimated population was 19,701. Between 2000 and 2010 the village population grew 237 percent, making Montgomery the ninth fastest growing municipality in Illinois during the decade.
Montgomery is located in southern Kane County and northern Kendall County at 41°43′08″N 88°23′32″W / 41.71889°N 88.39222°W / 41.71889; -88.39222 (41.7188316, -88.3920915). It is bordered to the north and east by Aurora, to the south by Oswego and Boulder Hill, and to the southwest by Yorkville. The village sits on both sides of the Fox River. U.S. Route 30 passes through the village, leading southeast 11 miles (18 km) to Plainfield and northwest 7 miles (11 km) to Sugar Grove. Illinois Route 31 runs through the village on the west side of the Fox River, leading northeast 2.5 miles (4.0 km) to the center of Aurora and southwest 3.5 miles (5.6 km) to the center of Oswego. Illinois Route 25 runs along the east side of the Fox River, also leading to Aurora and Oswego.
According to the 2010 census, Montgomery has a total area of 9.512 square miles (24.64 km), of which 9.34 square miles (24.19 km) (or 98.19%) is land and 0.172 square miles (0.45 km) (or 1.81%) is water.
As of the 2010 Census, there were 18,438 people residing in the village. The population density was 1,938.8 people per square mile. The racial makeup of the village was 75.32% White, 8.35% African American, 0.37% Native American, 3.19% Asian, 0.03% Pacific Islander, 9.37% from other races, and 3.37% from two or more races. Hispanic or Latino of any race were 26.7% of the population.
There were 5,998 households out of which 22.5% had children under the age of 18 living with them, 62.8% were married couples living together, 10.4% had a female householder with no husband present and 22.5% were non-families. 50.8% of all households contained individuals under the age of 18, while 5.8% had someone living alone who was 65 years of age or older. The average household size was 3.07 and the average family size was 3.52.
In the village, the population was spread out with 33.25% under the age of 18, 60.16% from 18 to 64, and 6.58% who were 65 years of age or older.
Of the 6,326 dwelling units in the village, 5,998 or 94.8% were occupied. 85.1% of the occupied housing units were owner occupied, with 14.9% occupied by renters.