Who moves to Thornton, and where they go

Every year the IRS counts how many people move between counties, based on the addresses on their tax returns. Here is what that shows for Adams County, CO, home of Thornton, between the 2022 and 2023 tax years.

Moved in
37,867from other US counties
Moved out
36,608to other US counties
Net
+1,259more arrivals than departures
From abroad
106tax filers and dependents only

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Where newcomers come from

CountyPeople
Denver County, CO (Denver)8,468
Arapahoe County, CO (Aurora)5,540
Jefferson County, CO (Lakewood)5,265
Weld County, CO (Greeley)1,964
Broomfield County, CO (Broomfield)1,671
Boulder County, CO (Boulder)1,396
Douglas County, CO (Highlands Ranch)735
Larimer County, CO (Fort Collins)693
El Paso County, CO (Colorado Springs)581
Maricopa County, AZ (Phoenix)379
Los Angeles County, CA (Los Angeles)268
Harris County, TX (Houston)208

Where people go when they leave

CountyPeople
Denver County, CO (Denver)5,734
Arapahoe County, CO (Aurora)4,662
Jefferson County, CO (Lakewood)4,360
Weld County, CO (Greeley)3,846
Broomfield County, CO (Broomfield)1,543
Boulder County, CO (Boulder)1,143
Douglas County, CO (Highlands Ranch)897
El Paso County, CO (Colorado Springs)721
Larimer County, CO (Fort Collins)717
Maricopa County, AZ (Phoenix)372
Morgan County, CO204
Clark County, NV (Las Vegas)188

Most moves are short hops within the same metro area. 27,425 of the newcomers came from elsewhere in Colorado and 10,442 from other states. Here are the long-distance moves only, more than 100 miles:

Long-distance newcomers come from

CountyPeople
Maricopa County, AZ (Phoenix)379
Los Angeles County, CA (Los Angeles)268
Harris County, TX (Houston)208
San Diego County, CA (San Diego)186
El Paso County, TX (El Paso)185
Clark County, NV (Las Vegas)179
Tarrant County, TX (Fort Worth)152
Pueblo County, CO (Pueblo)138

Long-distance movers go to

CountyPeople
Maricopa County, AZ (Phoenix)372
Clark County, NV (Las Vegas)188
Pueblo County, CO (Pueblo)183
Harris County, TX (Houston)176
El Paso County, TX (El Paso)170
San Diego County, CA (San Diego)160
Los Angeles County, CA (Los Angeles)158
Tarrant County, TX (Fort Worth)125

Frequently asked questions

Where do people moving to Thornton come from?

Most people moving into Adams County, CO come from nearby counties, led by Denver County, CO (8,468 people). The biggest source more than 100 miles away is Maricopa County, AZ.

Where do people leaving Thornton move to?

The top destination is Denver County, CO (5,734 people). Farther away, the most popular is Maricopa County, AZ.

Are more people moving to Thornton or leaving?

Between the 2022 and 2023 tax years, 37,867 people moved into Adams County, CO from elsewhere in the US and 36,608 moved out, a net gain of 1,259 (IRS data, not counting moves from abroad).

Thinking about the move yourself? Compare Thornton with any city it trades people with, like Thornton vs Phoenix, Thornton vs Los Angeles, Thornton vs Houston, Thornton vs San Diego.

Source: IRS Statistics of Income, county-to-county migration data for filing years 2022 to 2023, the latest available. Counts are people (the number of personal exemptions, which the IRS uses to approximate individuals): tax filers plus dependents whose address moved to a different county between the two filing years. People who do not file returns are not counted, and the IRS hides very small flows to protect privacy. Figures are for the whole county, not just the city of Thornton.