Kenai Peninsula Borough · Alaska
ZIP code 99603
- Population
- 11,557
- Median income
- $76,368
- Median home
- $345,600
- Sales tax
- 0%
ZCTA residents
Household, past 12 months
Owner-occupied value
Alaska state rate
Quick answer
ZIP 99603 sits in Kenai Peninsula Borough, Alaska and is home to 11,557 people. Median household income is $76,368, the median home is worth $345,600 and median gross rent is $1,236. 77.2% of households own their home, and purchases are taxed at 0% (Alaska state rate).
- County
- Kenai Peninsula Borough
- State
- Alaska (AK)
- Area codes
- Not published
- Metro area
- Outside covered metros
FIPS 02122
245 ZIPs covered
No NANPA match for this ZIP
Rate jurisdiction used for tax
The numbers for 99603
American Community Survey 2019-2023 ACS 5-year estimates for this ZCTA.
- Population
- 11,557ZIP 99603 residents
- Median household income
- $76,368Past 12 months, inflation adjusted
- Median home value
- $345,600Owner-occupied units
- Median gross rent
- $1,236Rent plus utilities, monthly
- Median age
- 39.7 yrsAll residents
- Homeownership rate
- 77.2%Owner-occupied households
Sales tax in 99603
What a purchase inside this ZIP costs at checkout.
Alaska levies 0% statewide, and counties, cities and special districts inside this ZIP can add their own local rate on top. Check the county page for the local component before you quote a price.
Affordability in this ZIP
Derived from the Census medians above — indicative, not an offer.
A rent burden above 30% is the federal threshold for cost-burdened households, and a price-to-income multiple above 4× is generally considered a stretched housing market. The mortgage figure is principal and interest only — taxes, insurance and HOA dues are extra.
How 99603 compares
ZIP 99603 against the median ZIP in Kenai Peninsula Borough and across Alaska.
| Measure | ZIP 99603 | County median | State median | vs state |
|---|---|---|---|---|
| Median household income | $76,368 | $82,573 | $63,203 | +21% |
| Median home value | $345,600 | $270,350 | $170,800 | +102% |
| Median gross rent | $1,236 | $1,133 | $1,040 | +19% |
| Population | 11,557 | 1,244 | 458 | +2423% |
Medians are computed across the 15 ZIP areas in Kenai Peninsula Borough and the 245 ZIP areas in Alaska.
Statewide rank
Where this ZIP places among all 245 Alaska ZIP areas.
- Income
- #71
- Home value
- #23
- Population
- #23
richer than 66% of 210 state ZIPs
above 88% of 185 state ZIPs
larger than 91% of 245 state ZIPs
Comparable ZIP codes
Alaska ZIP areas with almost the same household income.
| ZIP | County | Income | Home value | Rent |
|---|---|---|---|---|
| 99773 | Northwest Arctic Borough | $76,667 | $85,000 | — |
| 99503 | Bethel Census Area | $76,888 | $316,700 | $1,185 |
| 99833 | Petersburg Borough | $77,026 | $301,300 | $1,208 |
| 99573 | Copper River Census Area | $75,583 | $259,200 | $946 |
| 99761 | Northwest Arctic Borough | $77,500 | $156,300 | $850 |
| 99612 | Aleutians East Borough | $78,125 | $110,900 | $909 |
Nearby ZIP codes
Other ZIP codes filed under Kenai Peninsula Borough.
ZIP 99603 questions
Common questions about this ZIP code.
- Where is ZIP code 99603?
- ZIP 99603 lies mostly in Kenai Peninsula Borough, Alaska. County assignment follows the largest share of land area, so a ZIP straddling a county line is filed under its dominant county.
- What sales tax do I pay in 99603?
- Alaska charges 0% statewide, plus any county, city or district rate that applies locally.
- Is 99603 expensive to live in?
- Median rent runs $1,236 a month, about 19% of median household income, and the median home is worth $345,600 — +102% against the typical Alaska ZIP.
- Is a ZCTA the same as a postal ZIP code?
- Not exactly. The Census builds ZIP Code Tabulation Areas from the ZIP codes of addresses inside each census block, so a ZCTA can differ slightly from the USPS delivery route of the same number, and PO-box-only ZIPs have no ZCTA at all.
Keep going
Related pages for this area.
Sources & transparency
- US Census Bureau, ACS 2019-2023 5-year estimates — 2019-2023 ACS 5-year — population, income, housing
- Census 2020 ZCTA-to-county relationship file — County assignment by largest land-area overlap
- Alaska Department of Commerce (Alaska Municipal League rate tables) — Sales tax rates and local add-ons
Last reviewed December 2024. Figures are published for reference and can change; verify with the source agency before filing or contracting. How we build and check this data.