| Official Name: | Plum Valley, Illinois |
| Settlement Type: | Unincorporated community Census designated place |
| Pushpin Map: | Illinois#USA |
| Pushpin Label: | Plum Valley |
| Pushpin Label Position: | left |
| Coordinates: | 41.4608°N -87.5461°W |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Will |
| Subdivision Type3: | Township |
| Subdivision Name3: | Crete |
| Area Footnotes: | [1] |
| Area Total Sq Mi: | 1.87 |
| Area Land Sq Mi: | 1.87 |
| Area Water Sq Mi: | 0.00 |
| Area Total Km2: | 4.84 |
| Area Land Km2: | 4.84 |
| Area Water Km2: | 0.00 |
| Population As Of: | 2020 |
| Population Density Km2: | 130.66 |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 675 |
| Postal Code Type: | ZIP Code |
| Postal Code: | 60417 (Crete) |
| Area Code: | 815, 779 |
| Blank Name: | FIPS code |
| Blank Info: | 17-60826 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2806545 |
| Population Total: | 632 |
| Unit Pref: | Imperial |
| Population Density Sq Mi: | 338.33 |
Plum Valley is an unincorporated community and census-designated place (CDP) in Will County, Illinois, United States. It is in the northeast corner of the county, bordered to the north by Cook County and to the east by Lake County, Indiana. To the south is unincorporated Willow Brook Estates. Plum Creek flows from southwest to northeast through the center of the CDP.
Plum Valley was first listed as a CDP prior to the 2020 census.
Plum Valley first appeared as a census designated place in the 2020 U.S. Census.[2]
| White alone (NH) | 294 | 46.52% | |
| Black or African American alone (NH) | 223 | 35.28% | |
| Native American or Alaska Native alone (NH) | 2 | 0.32% | |
| Asian alone (NH) | 1 | 0.16% | |
| Pacific Islander alone (NH) | 0 | 0.00% | |
| Some Other Race alone (NH) | 0 | 0.00% | |
| Mixed Race or Multi-Racial (NH) | 26 | 4.11% | |
| Hispanic or Latino (any race) | 86 | 13.61% | |
| Total | 632 | 100.00% |