Herndon is a city located in Fairfax County Virginia. With a 2020 population of 24,817, it is the 23rd largest city in Virginia and the 1551st largest city in the United States . Herndon is currently growing at a rate of 0.44% annually and its population has increased by 6.55% since the most recent census, which recorded a population of 23,292 in 2010. Herndon reached it's highest population of 24,817 in 2021. Spanning over 4 miles, Herndon has a population density of 5,789 people per square mile.
The average household income in Herndon is $131,085 with a poverty rate of 5.88%. The median rental costs in recent years comes to $1,807 per month, and the median house value is $442,700. The median age in Herndon is 35.6 years, 36.5 years for males, and 34.2 years for females.