Ada County, ID
Ada County is located in the Southwest region of Idaho. The 2020 Census lists Ada County's population as 494,967. Our latest data shows that Ada County platted 4100 New Residential Subdivision Lots in 2025. See the table to the right for the information landproDATA.com maintains in Ada County.
| Data Type | Features | |
|---|---|---|
| Parcels | 221,987 | Total |
| Record Of Survey | 15,491 | Total |
| CPF | 8,943 | Total |
| Subdivisions | 7,708 | Total |
| Developments | 1,831 | Active |
| -Entitlement Lots | 8,131 | Active |
| -Approved Lots | 19,764 | Active |
| -Final Lots | 6,570 | Active |
| Building Permits | 956 | YTD |
| Vacant Lots | 6,142 | Buildable |
| Instruments | 5,067,252 | Total |
| News | 162,020 | Total |
Official County Website, County Code and other useful links:
More (11)
- Ada County Sheriff
- Ada County Assessor
- Ada County Assessor Tax Rates
- Ada County Assessor Commercial Codes
- Ada County Clerk Auditor Recorder
- Ada County Commissioners
- Ada County Development Services
- Ada County Parks, Recreation, Waterways
- Ada County Treasurer
- Ada County Public Information Request Form
- Ada County Public Information Request Form
landproDATA Newsletter and latest landproDATA features:
Analysis Reports & Newsletter
2025-12-31 | ||
2026-02-09 | ||
2025-02-27 | ||
2024-03-26 | ||
2024-03-12 |
Cities within Ada County, ID:
Return to: Cities & Counties