ZIP code 91001
Where is ZIP code 91001?
Altadena, California
Los Angeles County · Standard ZIP code
ZIP code 91001 belongs to Altadena, California in Los Angeles County. 91001 is a standard ZIP code, so it covers street addresses as well as PO Boxes. It is in the Pacific Time zone and uses area codes 626, 747 and 818. About 35,475 people live in the 91001 area, where the median household income is $134,903. The closest ZIP codes are 91003 (Altadena, 0.5 mi east), 91104 (Pasadena, 1.8 mi southeast) and 91103 (Pasadena, 1.9 mi southwest).
| ZIP code | 91001 |
|---|---|
| Type | Standard ZIP code for street addresses and PO Boxes |
| Status | Active |
| City | Altadena |
| State | California (CA) |
| County | Los Angeles County |
| Time zone | Pacific Time · now |
| Area codes | 626, 747, 818 |
| Coordinates | 34.1912, -118.1392 map |
| 3-digit prefix | 910 |
Population and income in 91001
| Population | 35,475 · higher than 73% of California ZIP codes |
|---|---|
| People per square mile | 4,295 · higher than 71% of California ZIP codes |
| Median age | 46.3 years · higher than 75% of California ZIP codes |
| Men / women | 49% / 51% |
| Median household income | $134,903 · higher than 81% of California ZIP codes |
| Income per person | $68,163 |
| Below the poverty line | 7.4% |
| Bachelor’s degree or higher | 54% of adults 25+ |
| Median home value | $1,135,200 · higher than 82% of California ZIP codes |
| Median rent | $2,437 a month |
| Housing units | 13,216 |
| Households | 12,587 (2.76 people on average) |
| Owners / renters | 80% / 20% |
| Land area | 8.26 sq mi (plus 0.04 sq mi of water) |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 91001. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 91001
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 91003 | Altadena, CA | 0.5 mi E | PO Box only |
| 91104 | Pasadena, CA | 1.8 mi SE | Standard |
| 91103 | Pasadena, CA | 1.9 mi SW | Standard |
| 91012 | La Canada Flintridge, CA | 2.8 mi W | PO Box only |
| 91199 | Pasadena, CA | 3 mi S | Unique |
| 91102 | Pasadena, CA | 3 mi S | PO Box only |
| 91109 | Pasadena, CA | 3 mi S | PO Box only |
| 91110 | Pasadena, CA | 3 mi S | Unique |
| 91114 | Pasadena, CA | 3 mi S | PO Box only |
| 91115 | Pasadena, CA | 3 mi S | PO Box only |
| 91116 | Pasadena, CA | 3 mi S | PO Box only |
| 91117 | Pasadena, CA | 3 mi S | PO Box only |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 91001 or measure the distance to another ZIP code.
How to address mail to 91001
123 MAIN ST
ALTADENA CA 91001
Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (91001-XXXX) helps mail sort faster but isn’t required.
Other ZIP codes in Altadena, CA
All Altadena ZIP codes with population and income →
Questions
- What city is ZIP code 91001?
- 91001 is a Altadena, California ZIP code.
- What county is 91001 in?
- ZIP code 91001 is in Los Angeles County, California.
- What time zone is ZIP code 91001 in?
- 91001 is in the Pacific Time zone (America/Los_Angeles).
- What area code is 91001?
- Phone numbers in ZIP code 91001 use area codes 626, 747 and 818.
- What is the population of ZIP code 91001?
- About 35,475 people live in ZIP code 91001, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 91001?
- The median household income in 91001 is $134,903 a year, higher than 81% of California ZIP codes.
- What ZIP codes are near 91001?
- The nearest ZIP codes to 91001 are 91003 (Altadena, 0.5 miles), 91104 (Pasadena, 1.8 miles), 91103 (Pasadena, 1.9 miles) and 91012 (La Canada Flintridge, 2.8 miles).