---
{
  "adminArea": "United States · Illinois · Will County",
  "aliases": [
    "威尔县"
  ],
  "availableLangs": [
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  "categories": [
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  "coordinates": {
    "latitude": 41.445,
    "longitude": -88.003
  },
  "createdAt": "2026-10-29T03:05:24+08:00",
  "id": "place_us_il_will_county",
  "lang": "en",
  "placeKind": "county",
  "revision": 40,
  "slug": "il-will-county",
  "sources": [
    {
      "id": "enwiki",
      "title": "Will County (Wikipedia)",
      "url": "https://en.wikipedia.org/wiki/Will_County"
    },
    {
      "id": "uscb2023",
      "title": "U.S. Census Bureau 2023 FIPS state and county codes",
      "url": "https://www.census.gov/library/reference/code-lists/ansi.html"
    },
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      "id": "geonames",
      "title": "GeoNames US dataset (US.txt / admin2Codes.txt)",
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  "status": "published",
  "summary": "Will County is a county in Illinois, United States, with county seat Joliet.",
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  "title": "Will County",
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  "updatedAt": "2026-10-30T05:13:43+08:00",
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}
---

# Will County

Will County is a county in Illinois, United States, with county seat Joliet.

## Administrative divisions

Will County is a county in [Illinois](/en/places/illinois.html), United States; the county seat is [Joliet](/en/places/il-joliet.html)[^uscb2023].

## Basic facts

- State: [Illinois](/en/places/illinois.html)[^uscb2023]
- County seat: [Joliet](/en/places/il-joliet.html)[^uscb2023]
- Division level: county[^uscb2023]

## Parent division

Located in [Illinois](/en/places/illinois.html).

## GeoNames data

- Population: about 677,560[^geonames]
- Coordinates listed by GeoNames: 41.4450, -87.9787[^geonames]
- FIPS code: il197[^geonames]

更新时间：2026-10-30

## 标签


## 关系


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## 来源

- Will County (Wikipedia)：https://en.wikipedia.org/wiki/Will_County 
- U.S. Census Bureau 2023 FIPS state and county codes：https://www.census.gov/library/reference/code-lists/ansi.html 
- GeoNames US dataset (US.txt / admin2Codes.txt)：https://download.geonames.org/export/dump/US.zip