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

20105 (Aldie), at 49.6%, among 17 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 Loudoun County, VA

These are the 17 ZIP codes in Loudoun County with the fastest population growth, out of 17 with at least 1,000 residents. 20105 (Aldie, 49.6%), 20148 (Ashburn, 24.9%) and 20166 (Sterling, 22.2%) lead the list. There is no single "best" ZIP code in Loudoun 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 Loudoun County

Rank	ZIP	Mailing city	Population change	Residents	Households	Residential mailboxes
1	20105	Aldie	49.6%	37,639	10,830	12,112
2	20148	Ashburn	24.9%	64,021	20,839	23,360
3	20166	Sterling	22.2%	14,949	5,473	6,658
4	20117	Middleburg	21.6%	2,790	1,263	1,164
5	20135	Bluemont	12.5%	3,585	1,389	1,335
6	20132	Purcellville	9.8%	19,817	6,381	6,304
7	20158	Hamilton	8.0%	4,979	1,580	1,591
8	20165	Sterling	6.8%	34,088	11,939	12,219
9	20141	Round Hill	6.4%	8,359	2,553	2,759
10	20147	Ashburn	6.0%	67,692	25,178	27,861
11	20164	Sterling	4.2%	43,436	12,806	13,224
12	20152	Chantilly	3.9%	36,674	11,047	11,498
13	20120	Centreville	3.8%	42,896	14,578	14,831
14	20175	Leesburg	-0.4%	34,733	12,240	12,750
15	20180	Lovettsville	-2.3%	7,531	2,525	2,996
16	20176	Leesburg	-2.6%	51,471	16,720	18,183
17	20197	Waterford	-26.0%	1,825	671	834

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; 17 of 20 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 39,794 households, on 75 carrier routes with 44,629 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 20105 on the EDDM route map

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Frequently asked questions

Which ZIP code in Loudoun County has the fastest population growth?: 20105 (Aldie), at 49.6%, among 17 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.