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Ada County


Treasure Valley of Southwestern Idaho

Facts & Information

The Cities and communities of Ada County, Idaho *

Boise (County Seat and State Capital)


Garden City





*This list of cities may not be complete. The list may contain towns, cities, villages, boroughs, neighborhoods, townships, ghost towns and other populated places.

If you have information about any of these unlinked communities, please send it to us and we will add a page for that community. Some of these places above may only be neighborhoods or local area names and are not listed with the census at all or just included in a larger surrounding designated census area..

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Information & Facts about Ada County, Idaho


Ada County official government site

County Commissioners
200 West Front Street
Boise, Idaho 83702
Phone: 208-287-7000

Boise is the County Seat of Ada County
City of Boise Official Website

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1990 - 205,775
2000 - 302,992
2001 - 312,714
2002 - 325,151

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Ada County is located in southwestern Idaho near the border with Oregon. Neighboring counties are Boise to the northeast and Canyon to the northwest. To the west is Elmore County and Gem County is to the north. Owyhee County is to the south.

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Average low temperature: 38 degrees F.
Average high temperature 63 degrees F.

Record maximum temperature 1961 to 1990: 110 degrees F.
Record minimum temperature 1961 to 1990: -25 degrees F.

Annual average precipitation: 12.1 inches
Annual average snowfall: 21.3 inches

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Other Facts & Figures:

per capita:
2000 - $33,518
2001 - $33,771
2002 - $34,072

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Here is a history page for Boise and the area. Here is another history page for the area.

On 22 December 1864, Ada County was carved out of Boise County. Boise was named the first county seat and still remains as such today. The county was named for the daughter of H.C. Riggs, Ada Riggs. She was the first white child born in the area. Her father was one of Boise's founders and because a prominent politician. Boise was also named the state capital in 1865. In just a few years, Washington County took part of the northwestern portion of Ada County for their county. Again, the county was divided in 1891 to make Canyon County. Finally, one more boundary change was made in 1930. Two communities, Ustick and Collister, were once towns in the county, but are no longer populated.

This Boise fact sheet also includes some history.

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Latitude: 43.606
Longitude: 116.22

Land area: 1,194 square miles

The Boise River runs through the county, specifically through the state capital of Boise.

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US GenWeb page for Ada County

Idaho Genealogical Society
P. O. Box 1854
Boise, ID 83701
Phone: 208-384-0542

The Political Graveyard for Ada County

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Ada Community Library
10664 W. Victory Rd.
Boise, Idaho 83709
Phone: 208-362-0181

Boise Public Library
715 South Capitol Boulevard
Boise, ID 83702
Phone: (208) 384-4076

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Independent School District of Boise City
8169 West Victory Rd.
Boise, Idaho 83709
Telephone (208) 854-4000
FAX (208) 384-3145

Joint School District #2
Serving Boise, Eagle, Meridian and Star
911 Meridian Rd.
Meridian, ID 83642
Phone: (208) 855-4500
FAX: (208) 888-6700

Boise State University in Boise

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Boise Valley Economic Partnership

The Boise Metropolitan area includes Ada, Boise, Canyon, Gem, and Owyhee Counties. Businesses in the area number over 18,000 with many corporate headquarters also located within the area.

While Tourism remains a major portion of the state's economy due to its great natural beauty, high tech manufacturing has come to the forefront of the economy here drawing business from three states - Idaho, Nevada and Oregon.

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Organizations & Groups:

Boise Convention and Visitors Bureau
1199 Main Street
Boise, ID 83702
PO Box 2106
Boise, ID 83702
Toll-free: 800.635.5240
Phone: 208.344.7777

Boise Metro Chamber of Commerce
250 S. 5th Street
Boise, Idaho 83702
Phone: 208-472-5200

Boise City Arts Commission

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Attractions & Other Information:

Western Idaho Fair

The Black History Museum

Idaho Botanical Garden
Main St and Warm Springs Road
Boise, Idaho
Phone: 208-343-8649
A self-guided nature trail takes you around these gardens. Displays, gardens, herbs and diverse specimens are available. A guide is also on site to answer questions and assist you.

Zoo Boise
355 N. Julia Davis Drive
Boise, Idaho 83702
Phone: (208) 384-4260
Many species may be found at the zoo plus visiting special exhibits during the year. Special family rates are available on specific days.

The Peregrine Fund
World Center for Birds of Prey
5668 W. Flying Hawk Lane
Boise, Idaho 83709
7 miles south of Boise.
Phone: 208-362-3716
Fax: 208-362-2376
The only center of its kind in the world. You may view many exhibits of not only birds of prey, but also ecology and biology displays. Be sure to visit the tropical forest at the facility. The Velma Morrison Interpretive Center at the World Center offers instruction and opportunity to learn about birds of prey.

State Capitol
Phone: (208) 334-2470
The capitol building is made from sandstone and marble and has displays to view as well as its architectural beauty. Tours are available. It was built from 1905 to 1920 costing over 2 million dollars. The building reaches up 208 feet to the top of the dome. The capitol is the only one in the country heated by geothermal water. The water is pumped from 3,000 feet underground

Boise Philharmonic
516 S. Ninth Street
Boise, ID 83702
Phone: 208-344-7849
Toll-free: 1-888-300-7849

Idaho Ballet

Basque Museum and Cultural Center
611 Grove Street
Boise, ID 83702

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This page was last updated on 19 August 2011 at 8:54 am

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