| City: | Boise, Idaho |
| Names to Avoid: | Idaho State House |
| County: | Ada County |
| Timezone: | Mountain (GMT -07:00) |
| Local Time: | 10:11:18 AM |
| Population: | No Population Data |
| Area Codes: | 208 / 986 |
| Classification: | Unique [Company/Government] |
| Coordinates: | 43.6177, -116.1997 |
| Land Area: | 0.009 sq mi |
| Quick Link: |
The Idaho State Capitol operates under dedicated ZIP code 83720 in Downtown Boise, Ada County. Construction began in 1905, fifteen years after Idaho achieved statehood in 1890, and the building was completed in 1920 at a cost of just over $2 million. Designed by architects John E. Tourtellotte and Charles Hummel, the Capitol features sandstone quarried from nearby Table Rock and a dome rising 208 feet into the Boise skyline. The building is notable as the only state capitol in the nation heated by geothermal water, pumped from over 3,000 feet underground.
The compact 0.01-square-mile boundary encompasses the Capitol building on Jefferson Street. Three delivery codes route mail to the Statehouse. Census County Business Patterns identifies 5 establishments and 24 employees within this ZIP. The Capitol houses Idaho's executive and legislative branches across approximately 190,000 square feet. A 2010 restoration added underground legislative meeting rooms known as the Garden Level. Boise is the valid mailing city for state government correspondence.
| Establishments: | 5 |
| Employment: | 24 |
| Residential: | 0 |
| Business: | 1 |
Buildings registered in the USPS ZIP+4 database with designated codes for direct mail delivery.
ZIP Code 83720 has 0 residents and 0 households. Age detail is not available. Gender breakdown is not available. Race and ethnicity breakdown is not available.
Explore More:Population Over TimeBy Age & GenderBy RaceBy GenderNativity & Citizenship
| 2020 Population: | 0Source: Census DHC |
| 2024 ACS Population Estimate: | 0Source: Census ACS |
| 2026 ZC Population Estimate: | 0Source: ZIP-Codes.com |
| Population Density: | 0.0 people per sq mile |
| Average Income: | $0Source: Census ACS |
| Households: | 0Source: Census DHC |
| Average House Value: | $666,666,666Source: Census ACS |
| Persons Per Household: | 0.00Source: Census DHC |
| Average Family Size: | 0.00Source: Census ACS |
| Group | 2010 | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Census ACS Population Estimate | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Decennial Census | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 0 | -- | -- | -- | -- |
Median Age: 0
Male Median Age: 0
Female Median Age: 0
| Group | < 5 | 5-9 | 10-14 | 15-19 | 20-24 | 25-29 | 30-34 | 35-39 | 40-44 | 45-49 | 50-54 | 55-59 | 60-64 | 65-69 | 70-74 | 75-79 | 80-84 | 85+ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Male | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Female | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Total | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| White: | 0 | 0% |
| Black: | 0 | 0% |
| Hispanic:* | 0 | 0% |
| Asian: | 0 | 0% |
| American Indian: | 0 | 0% |
| Hawaiian: | 0 | 0% |
| Other: | 0 | 0% |
| Total: | 0 | 100% |
| Gender | Count | % | Median Age |
|---|---|---|---|
| Males: | 0 | 0% | 0.0 years |
| Females: | 0 | 0% | 0.0 years |
| Total: | 0 | 100% | 0.0 years |
| Native, born in the United States: | 0 | 0% |
| Native, born in PR, Island Areas, or abroad: | 0 | 0% |
| Foreign born, naturalized U.S. citizen: | 0 | 0% |
| Foreign born, not a U.S. citizen: | 0 | 0% |
| Total Population: | 0 | 100% |
| Total Native Population: | 0 | 0% |
| Total Foreign-born Population: | 0 | 0% |
ZIP Code 83720 supports both business and residential activity. According to the Business Census (2024), there are 8 business establishments, employing about 31 people with an annual payroll of $2,351,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 1Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 8Source: CBP |
| 1st Quarter Payroll: | $633,000Source: CBP |
| Annual Payroll: | $2,351,000Source: CBP |
| # of Employees: | 31Source: CBP |
ZIP Code 83720 is located in Ada County, Idaho, within the Boise City, ID Metropolitan Statistical Area (CBSA 14260) and Idaho's 2nd Congressional District. This Metro area has a population of 616,561 people, about 0.00% of whom live in ZIP Code 83720. It covers 0.009 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | Boise City, IDSource: Census |
| CBSA Number: | 14260Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 616,561Source: Census |
| MSA: | Boise City, ID MSASource: Census |
| Land Area: | 0.009 sq miSource: Census |
| Water Area: | --Source: Census |
| Congressional District: | 02Source: USPS |
| Congressional Land Area: | 43225.09 sq miSource: Census |
| PMSA: | --Source: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | --Source: Census |
| Place Name: | --Source: Census |
We could not locate which school district 83720 belongs to, but we will update this once new district data is released. There are no public schools nor private schools with a mailing address in this ZIP Code. Listing Nearby schools instead. It also has 6 colleges, universities or post secondary education institutions nearby which would be a short commute to.
Our sources include trusted federal and licensed data from the United States Postal Service, U.S. Census Bureau, U.S. Geological Survey, Centers for Medicare & Medicaid Services, and the National Center for Education Statistics, along with proprietary datasets created by ZIP-Codes.com. Data last updated on February 1, 2026.