Diamond is a village in Grundy and Will Counties, Illinois. The population was 2,527 at the 2010 census. Terry Kernc is the current mayor of Diamond.
Diamond is located at 41°17′16″N 88°15′14″W / 41.28778°N 88.25389°W / 41.28778; -88.25389 (41.287699, -88.253824).
According to the 2010 census, Diamond has a total area of 1.89 square miles (4.90 km), all land.
As of the census of 2000, there were 1,393 people, 551 households, and 406 families residing in the village. The population density was 880.3 people per square mile (340.4/km²). There were 597 housing units at an average density of 377.3 per square mile (145.9/km²). The racial makeup of the village was 97.13% White, 0.65% Native American, 0.07% Asian, 0.86% from other races, and 1.29% from two or more races. Hispanic or Latino of any race were 3.52% of the population.
There were 551 households out of which 36.1% had children under the age of 18 living with them, 53.5% were married couples living together, 14.7% had a female householder with no husband present, and 26.3% were non-families. 21.4% of all households were made up of individuals and 5.6% had someone living alone who was 65 years of age or older. The average household size was 2.53 and the average family size was 2.95.
In the village, the population was spread out with 27.1% under the age of 18, 9.0% from 18 to 24, 30.9% from 25 to 44, 23.0% from 45 to 64, and 9.9% who were 65 years of age or older. The median age was 35 years. For every 100 females, there were 94.6 males. For every 100 females age 18 and over, there were 93.7 males.
The median income for a household in the village was $43,750, and the median income for a family was $49,688. Males had a median income of $46,136 versus $24,813 for females. The per capita income for the village was $20,223. About 5.6% of families and 8.6% of the population were below the poverty line, including 13.2% of those under age 18 and 9.5% of those age 65 or over.