Residential delivery area · Alaska
ZIP Code 99664: Seward, AK
ZIP code 99664 uses the postal name Seward, Alaska and lies entirely in Kenai Peninsula Borough (Census 2020 ZIP-county file). About 4,700 people live there (Census Bureau, ACS 2020-2024). Median household income is $87,760 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Bear Creek (1%), Primrose (1%), Seward (under 1%), Lowell Point (under 1%) and Crown Point (under 1%), and under 1% in smaller places; 96% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Seward · its only residential ZIP
- County
- Kenai Peninsula Borough
- Census places
- Bear Creek (1%) census-designated place; Primrose (1%) census-designated place; Seward (under 1%); Lowell Point (under 1%) census-designated place
- House district
- AK at large 119th Congress
- State
- Alaska
- Time zone
- Alaska
- Land area
- 2,688.3 sq mi · 2 people per sq mi
Where is ZIP code 99664?
99664 centers on 60.134°, -149.501° and covers 2,688.3 square miles of land plus 120.7 of water. It borders 7 ZIP codes: 99572, 99631, 99568, 99605, 99587, 99603, 99574.
The map draws ZIP code areas only. For the streets inside 99664, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 99664 compare with the rest of Kenai Peninsula Borough?
| Measure | 99664 | In Kenai Peninsula Borough | In AK |
|---|---|---|---|
| People (ACS 2020-2024) | 4,698 | 4th of 15 | 33rd of 245 |
| Median household income | $88k | 1st of 5 | 24th of 53 |
| Median home value | $385k | 1st of 7 | 15th of 57 |
Its median household income is higher than in 71% of U.S. residential ZIP codes, and it is denser than 6% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 99664?
The 2020 Census counted 5,155 people in 99664; the ACS, which samples households over 2020-2024, estimates 4,698. Between the 2010 and 2020 censuses its population grew 4.5% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 4,698±584 (90% margin)
- 2020 Census count
- 5,155+4.5% since 2010 (4,932)
- Households
- 1,697
- Median age
- 42.0
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 99664?
Of the 4,698 people the ACS estimates in 99664, 22.8% are under 18 and 13.5% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (84.4%), then Other or two or more (11.2%).
- Under 1822.8%
- 18 to 6463.7%
- 65 and older13.5%
- White, not Hispanic84.4%
- Other or two or more11.2%
- Hispanic or Latino2.5%
- Black, not Hispanic1.6%
- Asian, not Hispanic0.3%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 99664 earn?
Median household income is $87,760 (ACS 2020-2024), the highest of the 5 ranked ZIP codes in Kenai Peninsula Borough. It is not measurably different from 2015-2019 ($76,994 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $87,760±$16,008
- Income per person
- $39,384
- Below the poverty line
- 6.9%
- Unemployed (of the labor force)
- 4.1%
- Adults 25+ with a bachelor's degree
- 40.8%
- Adjusted gross income per tax return, 2022
- $79,3392,280 returns; wages 58% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 99664?
FHFA's house price index for 99664, built from repeat sales and appraisals of the same homes, rose 103% from 2015 to 2025 and rose 66% from 2020 to 2025, and moved +10.9% in 2025.
- Median home value (owners' estimate)
- $384,600
- Median gross rent
- $1,205
- Homes owned by their occupants
- 63.9%
- Housing units
- 2,268
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 99664?
243 business establishments had a location in this ZIP code in 2023, 15 more than in 2018; the most are in accommodation and food services (ZIP Code Business Patterns).
- Accommodation and food services72
- Transportation and warehousing34
- Retail trade26
- Health care and social assistance25
- Construction14
- Other services (except public administration)13
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 99664?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 99572 | Cooper Landing | 241 | $144k | 31.4 mi |
| 99631 | Moose Pass | 222 | – | 32.3 mi |
| 99568 | Clam Gulch | 465 | $85k | 39.1 mi |
| 99605 | Hope | 23 | – | 50.8 mi |
| 99587 | Girdwood | 1,949 | $164k | 61.3 mi |
| 99603 | Homer | 11,693 | $79k | 71.5 mi |
| 99574 | Cordova | 2,551 | $85k | 93.5 mi |
| 99672 | Sterling | 4,091 | $101k | 52.6 mi (near) |
| 99540 | Indian | 468 | $146k | 60.8 mi (near) |
| 99611 | Kenai | 16,510 | $80k | 63.9 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.