Loudoun County, Virginia ZIP codes
35 ZIP codes are in Loudoun County, plus 4 that cross in from neighboring counties. It's part of the Washington-Arlington-Alexandria, DC-VA-MD-WV metro area.
- ZIP codes
- 35
- Population in these ZIPs
- 431,177
- Avg. median income
- $182,900population-weighted
- Cities & towns
- 17
Click anywhere on the map to see which ZIP code it's in.
ZIP codes in Loudoun County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 20101 PO Box | Dulles | — | — | — |
| 20102 PO Box | Dulles | — | — | — |
| 20103 PO Box | Dulles | — | — | — |
| 20104 PO Box | Dulles | — | — | — |
| 20105 | Aldie | 37,639 | $219,123 | $1,083,300 |
| 20117 | Middleburg | 2,790 | $146,120 | $1,186,200 |
| 20118 PO Box | Middleburg | — | — | — |
| 20129 | Paeonian Springs | 538 | $250,001 | $1,291,900 |
| 20131 PO Box | Philomont | — | — | — |
| 20132 | Purcellville | 19,817 | $181,875 | $888,200 |
| 20134 PO Box | Purcellville | — | — | — |
| 20141 | Round Hill | 8,359 | $210,563 | $857,200 |
| 20142 PO Box | Round Hill | — | — | — |
| 20146 PO Box | Ashburn | — | — | — |
| 20147 | Ashburn | 67,692 | $163,904 | $746,100 |
| 20148 | Ashburn | 64,021 | $233,494 | $869,300 |
| 20149 PO Box | Ashburn | — | — | — |
| 20152 | Chantilly | 36,674 | $197,156 | $834,600 |
| 20158 | Hamilton | 4,979 | $211,522 | $970,600 |
| 20159 PO Box | Hamilton | — | — | — |
| 20160 PO Box | Lincoln | — | — | — |
| 20163 PO Box | Sterling | — | — | — |
| 20164 | Sterling | 43,436 | $135,660 | $584,200 |
| 20165 | Sterling | 34,088 | $183,076 | $733,400 |
| 20166 | Sterling | 14,949 | $133,401 | $615,800 |
| 20167 PO Box | Sterling | — | — | — |
| 20175 | Leesburg | 34,733 | $174,854 | $827,100 |
| 20176 | Leesburg | 51,471 | $168,299 | $828,600 |
| 20177 PO Box | Leesburg | — | — | — |
| 20178 PO Box | Leesburg | — | — | — |
| 20180 | Lovettsville | 7,531 | $151,483 | $788,900 |
| 20184 | Upperville | 635 | $50,278 | $1,187,100 |
| 20189 PO Box | Dulles | — | — | — |
| 20197 | Waterford | 1,825 | $190,703 | $1,306,400 |
| 20598 PO Box | Dhs | — | — | — |
ZIP codes partly in Loudoun County
These ZIP codes are mostly in a neighboring county but cover part of Loudoun County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 20120 | Centreville | Fairfax County | 42,896 | $152,563 | $686,700 |
| 20130 | Paris | Clarke County | 271 | $92,560 | $644,100 |
| 20135 | Bluemont | Clarke County | 3,585 | $114,219 | $643,200 |
| 22066 | Great Falls | Fairfax County | 17,185 | $250,001 | $1,674,500 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Loudoun County
Nearby counties
Frequently asked questions
How many ZIP codes are in Loudoun County, Virginia?
35 ZIP codes are mainly in Loudoun County, and 4 more ZIP codes from neighboring areas reach partly into it.
What cities are in Loudoun County?
ZIP codes in Loudoun County use the city names Aldie, Ashburn, Chantilly, Dhs, Dulles, Hamilton, Leesburg, Lincoln, Lovettsville, Middleburg, Paeonian Springs and Philomont and others.
What metro area is Loudoun County in?
Loudoun County is part of the Washington-Arlington-Alexandria, DC-VA-MD-WV metropolitan statistical area.