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Prince William Reporter

Friday, April 11, 2025

Census Bureau reports Montclair population was 21,329 in 2020

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Montclair had a population of 21,329 people in 2020, according to U.S. Census Bureau data obtained by the Prince William Reporter.

The median age was 39, with 47.8 percent of the total population being female and 52.2 percent male.

The state's total population in 2020 was 8,509,358.

An agency of the U.S. Federal Statistical System, the Census Bureau is responsible for compiling statistical facts about the American people, places and economy. Data for this story was compiled from the bureau’s American Community Survey. Information from the survey helps to determine how federal and state funds are distributed.

Montclair population by sex

Estimated NumberPercent of total population
Male11,14352.2
Female10,18647.8
Total Population21,329100

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