Biohazard Cleanup Near North Diamond Diamond, IL

Diamond is a village in Grundy County in northeastern Illinois, about an hour southwest of Chicago via Interstate 80 and Interstate 55.

Diamond began as the coal town of Black Diamond and was named for its location in the center of the 'Black Diamond' coal district; a post office called Diamond was established in 1872 and operated until 1909.

On February 16, 1883, the Diamond Mine flooded, killing 72 miners in one of the deadliest mining disasters in Illinois history; a monument in the village memorializes the men who died.

Coal from the surrounding Grundy County field remained the area's dominant industry into the early 20th century before the mines were exhausted and closed.

On November 17, 2013, an EF-2 tornado with winds estimated up to about 122 mph struck Diamond and neighboring Coal City during a rare late-autumn tornado outbreak, heavily damaging homes in the area.

Diamond's population was 2,640 at the 2020 census, up from 2,527 in 2010 and nearly double its 1,393 residents in 2000.

The village covers about 1.90 square miles, all of it land, with a population density of roughly 1,390 people per square mile — compact for a former coal town.