Diamond is a city located in Illinois. With a 2020 population of 2,492, it is the 445th largest city in Illinois and the 6830th largest city in the United States . Diamond is currently declining at a rate of -0.28% annually and its population has decreased by -1.39% since the most recent census, which recorded a population of 2,527 in 2010. Diamond reached it's highest population of 2,537 in 2010. Spanning over 2 miles, Diamond has a population density of 1,312 people per square mile.
The average household income in Diamond is $77,013 with a poverty rate of 9.49%. The median rental costs in recent years comes to $1,076 per month, and the median house value is $194,600. The median age in Diamond is 35 years, 36.1 years for males, and 34.1 years for females.