What County Is 83616 In?
Searching “83616 what county” or “Eagle Idaho county”? Here’s the definitive answer:
The 83616 ZIP code is 100% in Ada County, Idaho — the fastest-growing, most valuable, and most competitive county in the entire state.
Yes — every single luxury estate in Legacy, Two Rivers, Banbury, Mace River Ranch, Valyna Woods, Henry’s Fork, and the new riverfront developments sits squarely in Ada County.
Why Being in Ada County (83616) Is a Massive Deal Right Now
- Highest Appreciation in Idaho Ada County has outpaced every other Idaho county in home value growth for 7 consecutive years. 83616 specifically is up another 9.4% year-over-year as of December 2025.
- Lowest Property Tax Rate of Any Major Metro County Average effective rate in 83616: just 0.59–0.63% — that’s hundreds less per month than comparable homes in Park City, Bend, or Scottsdale.
- West Ada School District: Eagle High, Eagle Middle, Galileo STEM Academy, and the brand-new Paramount Elementary all fall inside 83616/Ada County boundaries.
- Ada County Building & Impact Fees Drive Exclusivity $150K–$250K in fees on new construction is exactly why Eagle stays upscale and inventory stays under 1 month of supply.
- Boise MSA Economic Engine Micron, HP, Albertsons, Simplot, and the new Meta-scale data centers are all expanding inside Ada County lines — meaning jobs keep flooding 83616.
Fast Facts Google Loves
- ZIP Code: 83616
- City: Eagle (plus tiny unincorporated pockets)
- County: Ada County (exclusively)
- County Seat: Boise
- Median Sold Price 83616 (Dec 2025): $989,000
- Average household income 83616: $168,000+ (top 1% in Idaho)
Bottom line: 83616 = Ada County = Idaho’s highest-equity real estate ZIP code in 2025–2026.
Want the hidden-pocket listings and off-market 83616 properties right now? I send these out daily to my buyers before they ever hit Zillow.
Search “83616 homes for sale,” “Eagle Idaho Ada County real estate,” or just shoot me a message — I’ve got you.
— Your Real Estate Expert 🦅
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