Sidney is a city located in Fremont County Iowa. It is also the county seat of Fremont County. With a 2020 population of 1,053, it is the 265th largest city in Iowa and the 10092nd largest city in the United States . Sidney is currently growing at a rate of 0.29% annually but its population has decreased by -7.47% since the most recent census, which recorded a population of 1,138 in 2010. Sidney reached it's highest population of 1,133 in 2010. Spanning over 1 miles, Sidney has a population density of 763 people per square mile.
The average household income in Sidney is $57,946 with a poverty rate of 14.74%. The median rental costs in recent years comes to $580 per month, and the median house value is $102,200. The median age in Sidney is 40.3 years, 41 years for males, and 39 years for females.