The 10 Fastest Growing Cities In Illinois For 2021

We used data and science to determine the places in Illinois everyone wants to move to today.

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Editor’s Note: Data has been updated for 2021. This is our seventh time ranking the fastest growing cities in Illinois.

Is being in an area that's growing quickly a good thing or a bad thing?

Depends on who you ask. Some want bigger, more exciting cities like Chicago and Aurora, while others want peace and quiet like in Marseilles and Robbins, thank you very much.

But today we're going to put opinions aside and just look at the cold hard facts -- over the past five years, which cities in Illinois have the grown the fastest.

After getting knee deep in the Census's American Community Survey, we emerged with this set of cities in the Prairie State that have people climbing over each other to get in.

These are the 10 fastest growing cities in Illinois for 2021 according to the most recent census data:

The 10 Fastest Growing Cities In Illinois For 2021

  1. Volo
  2. Pingree Grove
  3. Savoy
  4. Gilberts
  5. Yorkville
  6. Huntley
  7. Oswego
  8. Manhattan
  9. Plano
  10. Mahomet

What's the fastest growing city in Illinois for 2021? Based on the most recent ACS data, Volo ranks as the fastest growing city in Illinois. If you happen to be a resident of Volo, you're probably not too surprised to find it on our list.

If you're surprised--and you're wondering why these places are kind of a big deal--keep reading. We'll tell you what makes each of these 10 places in Illinois are growing like weeds.

And if you already knew these places were happening, check out the best places to live in Illinois or the Fastest Growing States In America.

For more Illinois state reading:

The 10 Fastest Growing Cities In Illinois For 2021

1. Volo

Overall SnackAbility


Population: 5,229
Rank Last Year: 1 (No Change)
Population 2010: 1,859
Percent Growth 181.3%
Absolute Growth: 3,370
More on Volo: Homes For Sale | Data

2. Pingree Grove

Pingree Grove, IL

Source: Public domain
Overall SnackAbility


Population: 8,107
Rank Last Year: 2 (No Change)
Population 2010: 3,780
Percent Growth 114.5%
Absolute Growth: 4,327
More on Pingree Grove: Homes For Sale | Data | Photos

3. Savoy

Savoy, IL

Overall SnackAbility


Population: 8,534
Rank Last Year: 3 (No Change)
Population 2010: 6,388
Percent Growth 33.6%
Absolute Growth: 2,146
More on Savoy: Homes For Sale | Data

4. Gilberts

Gilberts, IL

Source: Public domain
Overall SnackAbility


Population: 7,823
Rank Last Year: 4 (No Change)
Population 2010: 5,866
Percent Growth 33.4%
Absolute Growth: 1,957
More on Gilberts: Homes For Sale | Data | Photos

5. Yorkville

Yorkville, IL

Overall SnackAbility


Population: 19,352
Rank Last Year: 6 (Up 1)
Population 2010: 15,065
Percent Growth 28.5%
Absolute Growth: 4,287
More on Yorkville: Homes For Sale | Data | Photos

6. Huntley

Huntley, IL

Overall SnackAbility


Population: 26,966
Rank Last Year: 7 (Up 1)
Population 2010: 21,261
Percent Growth 26.8%
Absolute Growth: 5,705
More on Huntley: Homes For Sale | Data | Photos

7. Oswego

Oswego, IL

Overall SnackAbility


Population: 34,933
Rank Last Year: 9 (Up 2)
Population 2010: 27,719
Percent Growth 26.0%
Absolute Growth: 7,214
More on Oswego: Homes For Sale | Data | Photos

8. Manhattan

Manhattan, IL

Overall SnackAbility


Population: 8,164
Rank Last Year: 13 (Up 5)
Population 2010: 6,511
Percent Growth 25.4%
Absolute Growth: 1,653
More on Manhattan: Homes For Sale | Data | Photos

9. Plano

Plano, IL

Overall SnackAbility


Population: 11,752
Rank Last Year: 8 (Down 1)
Population 2010: 9,472
Percent Growth 24.1%
Absolute Growth: 2,280
More on Plano: Homes For Sale | Data | Photos

10. Mahomet

Mahomet, IL

Overall SnackAbility


Population: 8,392
Rank Last Year: 10 (No Change)
Population 2010: 6,888
Percent Growth 21.8%
Absolute Growth: 1,504
More on Mahomet: Homes For Sale | Data | Photos

How We Measured The Fastest Growing Cities In the Prairie State for 2021

To figure out which cities are growing the most, we simply had to look at the growth rates for cities sine the beginning of the decade, according to the American Community Survey put out by the census every year. Specifically:

  • Current Population
  • Population in 2010
  • Growth rate from 2010 to Current (The latest available data which came out in Dec 2018)

We ranked all 336 Illinois cities with a population over 5,000 people from highest growth rate to lowest.

The city with the highest growth rate during this time was crowned the fastest growing city in the Prairie State.

And for those of you who are a little rusty with their statistics, you can calculate the growth rate by the following formula:

[Current Population - Population 2010] / [Population 2010]

Here's a graph of the cities in Illinois with the largest percent increase in population:
Fastest Growing Cities in Illinois Graph For 2021

Click to enlarge

These Places Grew Up So Fast In Illinois, You Know?

So there you have it, the fastest growing cities in Illinois are led by Volo which has been growing at a blistering pace this decade relative to other cities and towns around the state.

It'll be interesting to see if these places can keep growing at the same rate over the next couple of years. We'll be here to let you know!

These places have been growing (or shrinking) the slowest (fastest):

  1. Taylorville
  2. West Frankfort
  3. Fairfield

For more Illinois reading, check out:

Detailed List Of Fastest Growing Places In Illinois For 2021

Rank City Growth Population Population 2010
1 Volo 181.3% 5,229 1,859
2 Pingree Grove 114.5% 8,107 3,780
3 Savoy 33.6% 8,534 6,388
4 Gilberts 33.4% 7,823 5,866
5 Yorkville 28.5% 19,352 15,065
6 Huntley 26.8% 26,966 21,261
7 Oswego 26.0% 34,933 27,719
8 Manhattan 25.4% 8,164 6,511
9 Plano 24.1% 11,752 9,472
10 Mahomet 21.8% 8,392 6,888

How Is The Area In ?

About Chris Kolmar

Chris Kolmar has been in the real estate business for almost ten years now. He originally worked for Movoto Real Estate as the director of marketing before founding HomeSnacks.

He believes the key to finding the right place to live comes down to looking at the data, reading about things to do, and, most importantly, checking it out yourself before you move.

If you've been looking for a place to live in the past several years, you've probably stumbled upon his writing already.

You can find out more about him on LinkedIn or his website.