---
type: Jurisdiction
title: "Jefferson County, ID"
classification: county
fips: "16051"
state: "ID"
demographics:
  population: 33154
  population_under_18: 10724
  population_18_64: 18476
  population_65_plus: 3954
  median_household_income: 86679
  poverty_rate: 9.68
  homeownership_rate: 83.03
  unemployment_rate: 2.69
  median_home_value: 408400
  gini_index: 0.3748
  vacancy_rate: 5.38
  race_white: 29020
  race_black: 45
  race_asian: 42
  race_native: 79
  hispanic: 3638
  bachelors_plus: 6987
districts:
  - to: "us/states/id/districts/02"
    rel: in-district
    area_weight: 1.0
  - to: "us/states/id/districts/senate/31"
    rel: in-district
    area_weight: 0.9999
sources:
  - field: demographics
    source: "Census ACS 2023"
  - field: districts
    source: "PostGIS area-intersection over Census TIGER 2024 boundaries"
confidence: official
tags: [jurisdiction, county, id]
timestamp: "2026-07-03"
---

# Jefferson County, ID

County jurisdiction.

## Demographics (ACS 2023)

| Measure | Value |
| --- | --- |
| Population | 33154 |
| Under 18 | 10724 |
| 18–64 | 18476 |
| 65+ | 3954 |
| Median household income | 86679 |
| Poverty rate | 9.68 |
| Homeownership rate | 83.03 |
| Unemployment rate | 2.69 |
| Median home value | 408400 |
| Gini index | 0.3748 |
| Vacancy rate | 5.38 |
| White | 29020 |
| Black | 45 |
| Asian | 42 |
| Native | 79 |
| Hispanic/Latino | 3638 |
| Bachelor's or higher | 6987 |

## Districts

- [ID-02](/us/states/id/districts/02.md) — 100% (congressional)
- [ID Senate District 31](/us/states/id/districts/senate/31.md) — 100% (state senate)

## Source

- demographics: Census ACS 2023
- districts: PostGIS area-intersection over Census TIGER 2024 boundaries