What County Is Herndon, Virginia In?
Herndon is in Fairfax County and Loudoun County. Check a specific address near a county line. About 24,672 people live there (2020–2024 estimate). It uses Eastern Time and covers 4.29 sq mi (11.1 km²) of land. The nearest city or town of 50,000 people or more is Reston, 2.6 mi southeast.
- Population, 2020–2024 estimate
- 24,672 ± 39
- Land area
- 4.29 sq mi (11.1 km²)
- Time zone
- Eastern TimeUTC-05:00 in January; UTC-04:00 in July
- Sun today
- Sunrise and sunset for the year
- Elevation
- 354 ft 108 m, ground height at the central point
- Median household income
- $148,000 ± $18,469
- Median home value
- $599,100 ± $23,806
- Median rent, with utilities
- $2,259 ± $80
- Homes lived in by their owners
- 62.1% ± 4.5 points
- Water area
- 0.01 sq mi (0.02 km²)
- State
- Virginia
- Census place code
- 5136648
- Coordinates (central point)
- 38.970412, -77.387073
These coordinates mark a central point for the area, not a street address. Population, income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.
County boundaries in Herndon
This place crosses county lines. A city name alone cannot identify the county for every address. Check a point on the county map.
Coordinates of Herndon
38.970412, -77.387073 is a central point for Herndon, not a street address. Convert these coordinates or share a map link.
Elevation in Herndon
354 ft (108 m), the USGS ground height at Herndon’s central point (3DEP terrain, 1 m grid, NAVD 88). Ground height varies across town. Check elevation at another spot.
Sunrise and sunset in Herndon
- Longest day
- 14 hours 54 minutes around June 21
- Shortest day
- 9 hours 26 minutes around December 21
- Earliest sunrise
- 5:43 AM around June 14
- Latest sunrise
- 7:42 AM the day before clocks go back in November
- Earliest sunset
- 4:47 PM around December 7
- Latest sunset
- 8:39 PM around June 28
Clocks go forward an hour on the second Sunday in March and back on the first Sunday in November, so sunrise and sunset jump an hour later in March and an hour earlier in November.
| Day | Sunrise | Sunset | Daylight |
|---|---|---|---|
| Jan 15 | 7:26 AM | 5:11 PM | 9 h 45 min |
| Feb 15 | 7:01 AM | 5:46 PM | 10 h 45 min |
| Mar 15 | 7:21 AM | 7:16 PM | 11 h 55 min |
| Apr 15 | 6:33 AM | 7:46 PM | 13 h 13 min |
| May 15 | 5:57 AM | 8:15 PM | 14 h 18 min |
| Jun 15 | 5:43 AM | 8:36 PM | 14 h 53 min |
| Jul 15 | 5:56 AM | 8:34 PM | 14 h 38 min |
| Aug 15 | 6:22 AM | 8:04 PM | 13 h 42 min |
| Sep 15 | 6:50 AM | 7:18 PM | 12 h 28 min |
| Oct 15 | 7:18 AM | 6:31 PM | 11 h 13 min |
| Nov 15 | 6:52 AM | 4:55 PM | 10 h 3 min |
| Dec 15 | 7:21 AM | 4:48 PM | 9 h 27 min |
Approximate times for a flat horizon at the central point; the days move by a day or so from year to year. Hills and weather can change what you see.
Time zones in Herndon
Herndon uses Eastern Time (America/New_York).
| Time zone | Local time and UTC offset | Next clock change |
|---|---|---|
| Eastern TimeAmerica/New_York | UTC-05:00 in January; UTC-04:00 in July. Enable JavaScript for the live clock. | Enable JavaScript for upcoming changes. |
Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.
ZIP Code areas, largest first
2 ZIP Code areas overlap Herndon. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.
Bordering areas, nearest first
Distances are straight lines between map points.
- Hutchison, Virginia (CDP)1.4 mi west
- Oak Grove, Virginia (CDP)1.8 mi northwest
- McNair, Virginia (CDP)1.9 mi southwest
- Dranesville, Virginia (CDP)2.0 mi northeast
- Sterling, Virginia (CDP)2.6 mi northwest
- Reston, Virginia (CDP)2.6 mi southeast
Before using this answer on a form
A city boundary, a CDP and a mailing city can mean different things.
Find the county where you are now, check its ZIP area, or check the time zone where you are.