Lena is a city located in Stephenson County Illinois. With a 2020 population of 2,677, it is the 436th largest city in Illinois and the 6608th largest city in the United States . Lena is currently declining at a rate of -0.78% annually and its population has decreased by -8.07% since the most recent census, which recorded a population of 2,912 in 2010. Lena reached it's highest population of 2,908 in 2010. Spanning over 3 miles, Lena has a population density of 1,010 people per square mile.
The average household income in Lena is $69,107 with a poverty rate of 8.86%. The median rental costs in recent years comes to $421 per month, and the median house value is $110,700. The median age in Lena is 49.5 years, 49.6 years for males, and 49.5 years for females.