---
{
  "adminArea": "United States · Illinois · Jefferson County",
  "availableLangs": [
    "zh",
    "en"
  ],
  "categories": [
    "category-geography"
  ],
  "coordinates": {
    "latitude": 38.30052,
    "longitude": -88.92401
  },
  "createdAt": "2026-10-29T10:30:06+08:00",
  "id": "place_us_il_jefferson_county",
  "lang": "en",
  "placeKind": "county",
  "revision": 2,
  "slug": "il-jefferson-county",
  "sources": [
    {
      "id": "geonames",
      "title": "GeoNames US dataset (US.txt / admin2Codes.txt)",
      "url": "https://download.geonames.org/export/dump/US.zip"
    }
  ],
  "status": "published",
  "summary": "Jefferson County is a county of Illinois, United States.",
  "tags": [],
  "title": "Jefferson County",
  "type": "place",
  "updatedAt": "2026-10-29T10:30:06+08:00",
  "updatedBy": "user:admin"
}
---

# Jefferson County

Jefferson County is a county of Illinois, United States.

## Overview

Jefferson County is a county of [Illinois](/en/places/illinois.html), United States (FIPS il081), with a population of about 38,827[^geonames].

## Geography

- Coordinates: 38.3005, -88.9240
- Time zone: America/Chicago

更新时间：2026-10-29

## 标签


## 关系

- Located in：[Illinois](/en/places/illinois.html) 
- Contains places：[Belle Rive](/en/places/il-belle-rive.html) 
- Contains places：[Bluford](/en/places/il-bluford.html) 
- Contains places：[Bonnie](/en/places/il-bonnie.html) 
- Contains places：[Dix](/en/places/il-dix.html) 
- Contains places：[Ina](/en/places/il-ina.html) 
- Contains places：[Mount Vernon](/en/places/il-mount-vernon.html) 
- Contains places：[Nason](/en/places/il-nason.html) 
- Contains places：[Opdyke](/en/places/il-opdyke.html) 
- Contains places：[Waltonville](/en/places/il-waltonville.html) 
- Contains places：[Woodlawn](/en/places/il-woodlawn.html) 

第 1 / 1 页，共 11 条。

## 正文反向链接

- [Belle Rive](/en/places/il-belle-rive.html)
- [Bluford](/en/places/il-bluford.html)
- [Bonnie](/en/places/il-bonnie.html)
- [Dix](/en/places/il-dix.html)
- [Ina](/en/places/il-ina.html)
- [Mount Vernon](/en/places/il-mount-vernon.html)
- [Nason](/en/places/il-nason.html)
- [Opdyke](/en/places/il-opdyke.html)
- [Waltonville](/en/places/il-waltonville.html)
- [Woodlawn](/en/places/il-woodlawn.html)

## 来源

- GeoNames US dataset (US.txt / admin2Codes.txt)：https://download.geonames.org/export/dump/US.zip