Diamond is a village in Grundy and Will Counties, Illinois. The population was 2,640 at the 2020 census.
History
A post office called Diamond was established in 1872, and remained in operation until 1909. Black Diamond had its start as a coal town. The village was named for its location in the center of the "Black Diamond" coal district.
On February 16, 1883, the Diamond Mine flooded, killing 72 miners. A monument was erected in Diamond memorializing the event.
On November 17, 2013, an EF-2 tornado hit Diamond.
Geography
According to the 2021 census gazetteer files, Diamond has a total area of , all land.
Demographics
Racial and ethnic composition
{| class="wikitable sortable" style="text-align:center;"
|+Diamond village, Illinois – Racial and ethnic composition<br><small></small>
!Race / Ethnicity <small>(NH = Non-Hispanic)</small>
!Pop 2000
!Pop 2010
!style="background-color: #ffffb3;" |Pop 2020
!% 2000
!% 2010
!style="background-color: #ffffb3;" |% 2020
|-
|White alone (NH)
|1,320
|2,328
|style='background: #ffffe6; |2,276
|94.76%
|92.13%
|style='background: #ffffe6; |86.21%
|-
|Black or African American alone (NH)
|0
|20
|style='background: #ffffe6; |24
|0.00%
|0.79%
|style='background: #ffffe6; |0.91%
|-
|Native American or Alaska Native alone (NH)
|9
|5
|style='background: #ffffe6; |5
|0.65%
|0.20%
|style='background: #ffffe6; |0.19%
|-
|Asian alone (NH)
|1
|5
|style='background: #ffffe6; |14
|0.07%
|0.20%
|style='background: #ffffe6; |0.53%
|-
|Native Hawaiian or Pacific Islander alone (NH)
|0
|1
|style='background: #ffffe6; |3
|0.00%
|0.04%
|style='background: #ffffe6; |0.11%
|-
|Other race alone (NH)
|0
|0
|style='background: #ffffe6; |7
|0.00%
|0.00%
|style='background: #ffffe6; |0.27%
|-
|Mixed race or Multiracial (NH)
|14
|34
|style='background: #ffffe6; |135
|1.01%
|1.35%
|style='background: #ffffe6; |5.11%
|-
|Hispanic or Latino (any race)
|49
|134
|style='background: #ffffe6; |176
|3.52%
|5.30%
|style='background: #ffffe6; |6.67%
|-
|Total
|1,393
|2,527
|style='background: #ffffe6; |2,640
|100.00%
|100.00%
|style='background: #ffffe6; |100.00%
|}
2020 census
As of the 2020 census, Diamond had a population of 2,640. The median age was 36.1 years. 27.8% of residents were under the age of 18 and 13.0% of residents were 65 years of age or older. For every 100 females, there were 103.5 males, and for every 100 females age 18 and over, there were 99.9 males. The population density was . There were 1,043 housing units at an average density of .
99.8% of residents lived in urban areas, while 0.2% lived in rural areas.
There were 1,006 households in Diamond, of which 39.3% had children under the age of 18 living in them. Of all households, 48.9% were married-couple households, 19.2% were households with a male householder and no spouse or partner present, and 23.5% were households with a female householder and no spouse or partner present. About 26.3% of all households were made up of individuals, and 12.2% had someone living alone who was 65 years of age or older.
Most of Diamond in Will County is in the Reed Custer Community Unit School District 255U<!--UNI 33380-->, while a piece is in the Wilmington Community Unit School District 209U,<!--UNI 42630--> and another piece is in the Coal City district.<!--UNI 10530-->