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

15864 (Summerville), at 10.2%, among 10 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, PA

These are the 10 ZIP codes in Jefferson County with the fastest population growth, out of 10 with at least 1,000 residents. 15864 (Summerville, 10.2%), 15860 (Sigel, 7.7%) and 15823 (Brockport, 6.0%) 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	15864	Summerville	10.2%	1,789	703	760
2	15860	Sigel	7.7%	1,160	525	520
3	15823	Brockport	6.0%	1,266	577	609
4	15825	Brookville	5.7%	9,426	3,971	4,082
5	15851	Reynoldsville	4.8%	7,059	2,718	2,794
6	15824	Brockway	-0.6%	5,115	2,149	2,141
7	15840	Falls Creek	-0.7%	1,928	813	645
8	15767	Punxsutawney	-3.2%	13,918	5,943	5,953
9	15829	Corsica	-10.7%	1,233	498	478
10	16240	Mayport	-13.9%	1,327	546	669

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; 10 of 26 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 8,494 households, on 23 carrier routes with 8,765 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 15864 on the EDDM route map

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Frequently asked questions

Which ZIP code in Jefferson County has the fastest population growth?: 15864 (Summerville), at 10.2%, among 10 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.