Which ZIP code in Jefferson County has the fastest population growth?

59632 (Boulder), at 71.8%, among 6 ZIP codes with at least 1,000 residents.

Why are some ZIP codes missing?

ZIP codes with fewer than 1,000 residents are left out because their survey estimates swing too much to rank, and so are ZIP codes where the Census Bureau did not publish this figure.

Fastest-growing ZIP codes in Jefferson County, MT

These are the 6 ZIP codes in Jefferson County with the fastest population growth, out of 6 with at least 1,000 residents. 59632 (Boulder, 71.8%), 59752 (Three Forks, 51.8%) and 59635 (East Helena, 20.9%) lead the list. There is no single "best" ZIP code in Jefferson County; the right one depends on who you want to reach, so the same ZIP codes are ranked several ways below.

Fastest-growing ZIP codes in Jefferson County

Rank	ZIP	Mailing city	Population change	Residents	Households	Residential mailboxes
1	59632	Boulder	71.8%	2,557	989	64
2	59752	Three Forks	51.8%	5,404	2,013	1,338
3	59635	East Helena	20.9%	8,292	3,381	—
4	59701	Butte	2.1%	34,232	14,888	—
5	59634	Clancy	-1.5%	5,521	1,974	2,033
6	59759	Whitehall	-4.9%	3,631	1,630	—

How we ranked them

Ranked by the change in ACS population estimates between the 2015–2019 and 2020–2024 releases. Both are 5-year averages, and ZIP code areas were redrawn for 2020, so a large change can partly reflect a boundary change. Both periods must have at least 1,000 residents. ZIP codes need at least 1,000 residents to be ranked; 6 of 9 qualify.

Which of these to mail, and why

Growing ZIP codes add households every year, which means new homes, new routes and customers without a go-to provider yet. Check the route map: new subdivisions can appear as new carrier routes.

The top five ZIP codes on this list hold 23,245 households. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 59632 on the EDDM route map

More rankings

Businesses that mail these ZIP codes

Map it and price it

EDDM guides

Frequently asked questions

Which ZIP code in Jefferson County has the fastest population growth?: 59632 (Boulder), at 71.8%, among 6 ZIP codes with at least 1,000 residents.
How is this ranking calculated?: Ranked by the change in ACS population estimates between the 2015–2019 and 2020–2024 releases. Both are 5-year averages, and ZIP code areas were redrawn for 2020, so a large change can partly reflect a boundary change. Both periods must have at least 1,000 residents.
Why are some ZIP codes missing?: ZIP codes with fewer than 1,000 residents are left out because their survey estimates swing too much to rank, and so are ZIP codes where the Census Bureau did not publish this figure.

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.