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

20117 (Middleburg), at 53.4 (±5.8), 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.

Oldest ZIP codes in Loudoun County, VA

These are the 17 ZIP codes in Loudoun County with the highest median age, out of 17 with at least 1,000 residents. 20117 (Middleburg, 53.4), 20197 (Waterford, 48.1) and 20135 (Bluemont, 47.3) 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.

Oldest ZIP codes in Loudoun County

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

How we ranked them

Ranked by median age of all residents, highest 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

Older ZIP codes respond to health care, hearing and vision, Medicare plans, home safety, estate planning and services that come to the door.

The top five ZIP codes on this list hold 7,428 households, on 16 carrier routes with 7,920 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 20117 on the EDDM route map

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Frequently asked questions

Which ZIP code in Loudoun County has the highest median age?: 20117 (Middleburg), at 53.4 (±5.8), among 17 ZIP codes with at least 1,000 residents.
How is this ranking calculated?: Ranked by median age of all residents, highest 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.