Which ZIP code in Loudoun County has the lowest median age?

20166 (Sterling), at 34.0 (±1.4), 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.

Youngest ZIP codes in Loudoun County, VA

These are the 17 ZIP codes in Loudoun County with the lowest median age, out of 17 with at least 1,000 residents. 20166 (Sterling, 34.0), 20164 (Sterling, 35.6) and 20105 (Aldie, 36.2) 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.

Youngest ZIP codes in Loudoun County

Rank	ZIP	Mailing city	Median age	Residents	Households	Residential mailboxes
1	20166	Sterling	34.0 ±1.4	14,949	5,473	6,658
2	20164	Sterling	35.6 ±1.1	43,436	12,806	13,224
3	20105	Aldie	36.2 ±1.1	37,639	10,830	12,112
4	20141	Round Hill	37.0 ±2.2	8,359	2,553	2,759
5	20175	Leesburg	38.1 ±1.4	34,733	12,240	12,750
6	20120	Centreville	38.4 ±1.3	42,896	14,578	14,831
7	20165	Sterling	38.4 ±1.5	34,088	11,939	12,219
8	20152	Chantilly	38.5 ±0.7	36,674	11,047	11,498
9	20148	Ashburn	38.7 ±0.6	64,021	20,839	23,360
10	20176	Leesburg	38.7 ±1.0	51,471	16,720	18,183
11	20147	Ashburn	39.6 ±1.1	67,692	25,178	27,861
12	20132	Purcellville	40.6 ±2.3	19,817	6,381	6,304
13	20180	Lovettsville	43.4 ±2.4	7,531	2,525	2,996
14	20158	Hamilton	43.5 ±5.0	4,979	1,580	1,591
15	20135	Bluemont	47.3 ±9.2	3,585	1,389	1,335
16	20197	Waterford	48.1 ±7.7	1,825	671	834
17	20117	Middleburg	53.4 ±5.8	2,790	1,263	1,164

How we ranked them

Ranked by median age of all residents, lowest first (ACS 5-year estimates, 2020–2024). ZIP codes need at least 1,000 residents to be ranked; 17 of 20 qualify.

Which of these to mail, and why

Younger ZIP codes skew toward renters, students and young families: fitness, quick-service food, apartments, entertainment and first-time-buyer offers.

The top five ZIP codes on this list hold 43,902 households, on 86 carrier routes with 47,503 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 20166 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 Loudoun County has the lowest median age?: 20166 (Sterling), at 34.0 (±1.4), among 17 ZIP codes with at least 1,000 residents.
How is this ranking calculated?: Ranked by median age of all residents, lowest first (ACS 5-year estimates, 2020–2024).
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.