German Valley is a city located in Stephenson County Illinois. With a 2020 population of 421, it is the 933rd largest city in Illinois and the 14061st largest city in the United States . German Valley is currently declining at a rate of -0.47% annually and its population has decreased by -9.07% since the most recent census, which recorded a population of 463 in 2010. German Valley reached it's highest population of in . Spanning over 0 miles, German Valley has a population density of 881 people per square mile.
The average household income in German Valley is $65,338 with a poverty rate of 12.20%. The median rental costs in recent years comes to $654 per month, and the median house value is $89,100. The median age in German Valley is 37.2 years, 36.1 years for males, and 38.6 years for females.