Twin Falls is a city located in Twin Falls County Idaho. It is also the county seat of Twin Falls County. With a 2020 population of 51,165, it is the 8th largest city in Idaho and the 770th largest city in the United States . Twin Falls is currently growing at a rate of 0.95% annually and its population has increased by 15.95% since the most recent census, which recorded a population of 44,125 in 2010. Twin Falls reached it's highest population of 51,165 in 2021. Spanning over 19 miles, Twin Falls has a population density of 2,662 people per square mile.
The average household income in Twin Falls is $64,694 with a poverty rate of 14.78%. The median rental costs in recent years comes to $818 per month, and the median house value is $162,000. The median age in Twin Falls is 33.3 years, 33.4 years for males, and 33.1 years for females.