Zip Code 94587
Union City, California — Alameda County
📍 ZIP code 94587 is in Union City, Alameda County, California.
ZIP code 94587 is located in Union City, Alameda County, California. It is a zip code in the Pacific (PST/PDT) Time Zone with an estimated population of 68,141. The area code for ZIP code 94587 is 408.
Quick Answer
Zip code 94587 is in Union City, California (Alameda County). It has a population of 68,141, median household income of $137,194, and median home value of $1,058,200.
Population
68,141
Income
$137,194
Home Value
$1,058,200
Climate
78°F / 43°F
About Zip Code 94587
Zip code 94587 is located in Union City, California, within Alameda County. Home to approximately 68,141 residents, this area sits at an elevation of 95 ft and falls within the Pacific (PST/PDT) timezone. The local area code is 408.
The median household income is $137,194 per year, which is above the national median of $70,784. Homes in this zip code have a median value of $1,058,200, and the cost of living index is 250 (150% above the national average of 100).
Summers average a high of 78°F while winters drop to 43°F. The area receives about 16 in of rain annually. The zip code covers 19.7 square miles of land area.
Key Statistics
68,141
$137,194
$1,058,200
Pacific (PST/PDT)
408
95 ft
19.7 sq mi
42.1
21,923
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Compare With Nearby Zip Codes
| Metric | 94587 | 94544 | 94536 | 94542 | 94555 | 94545 |
|---|---|---|---|---|---|---|
| City | Union City, CA | Hayward, CA | Fremont, CA | Hayward, CA | Fremont, CA | Hayward, CA |
| Population | 68,141 | 76,739 | 70,707 | 14,729 | 37,500 | 33,186 |
| Median Income | $137,194 | $108,358 | $156,672 | $131,989 | $213,488 | $115,258 |
| Home Value | $1,058,200 | $801,900 | $1,210,200 | $1,085,900 | $1,295,000 | $838,800 |
| Cost of Living | 250 | 213 | 250 | 250 | 250 | 226 |
| Median Age | 42.1 | 37.3 | 38.6 | 42.7 | 39.2 | 41.1 |
Cost of Living
100 = National Average. Union City's cost of living is 150% above the national average.
vs. State Avg
Above
Affordability
Expensive
Income-to-Home
7.7x
Demographics
Zip code 94587 has a population of 68,141 people with a median age of 42.1. There are 21,923 housing units in this area.
Racial & Ethnic Composition
Source: U.S. Census Bureau American Community Survey estimates.
Population History
Union City (94587) population trend from 2010 to 2024
↑ 6.4%Source: U.S. Census Bureau estimates and American Community Survey data.
Climate & Weather
78°F
43°F
16 in
0 in
Union City experiences mild summers with average highs around 78°F. Winters are mild with lows averaging 43°F. The area receives virtually no snowfall.
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Housing & Economy
Median Home Value
$1,058,200
Median Household Income
$137,194
With 21,923 housing units across 19.7 square miles, 94587 has a housing density of 1,113 units per square mile. The home price-to-income ratio is 7.7x.
Location & Geography
Latitude
37.6032°
Longitude
-122.0186°
Land Area
19.7 sq mi
Water Area
0 sq mi
Nearby Zip Codes
Zip codes closest to 94587 (Union City, CA) with distances:
ZIP Codes with Similar Income Nationwide
The five U.S. ZIP codes whose median household income is closest to 94587's $137,194. A way to compare Union City to economically similar communities elsewhere in the country.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
ZIP Codes with Similar Demographics
The five U.S. ZIP codes whose racial and ethnic composition most closely matches 94587 (Union City, CA). Similarity is measured by cosine distance on the five-category ACS demographic vector.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
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People Also Ask
What zip code is Union City, California?
Union City, California uses zip code 94587.
What county is zip code 94587 in?
Zip code 94587 is located in Alameda County, California.
What is the population of zip code 94587?
The population of zip code 94587 is 68,141 with a median age of 42.1.
Is 94587 in Union City, California?
Yes, zip code 94587 is in Union City, Alameda County, California. The area code is 408.
Frequently Asked Questions
What city is zip code 94587 in?
Zip code 94587 is in Union City, California. It is part of Alameda County and uses the Pacific (PST/PDT) timezone.
What is zip code 94587?
Zip code 94587 is a U.S. postal code in Union City, California (Alameda County). It has a population of 68,141 and covers 19.7 square miles.
What is the population of zip code 94587?
The population of zip code 94587 (Union City, CA) is 68,141 with a median age of 42.1. There are approximately 21,923 housing units in this area.
What is the median income in zip code 94587?
The median household income in zip code 94587 (Union City, CA) is $137,194 per year. The cost of living index is 250 (100 = national average).
What is the average home price in zip code 94587?
The median home value in zip code 94587 (Union City, CA) is $1,058,200. The cost of living index is 250 compared to the national average of 100.
What county is zip code 94587 in?
Zip code 94587 is located in Alameda County, California. The primary city is Union City.
What is the area code for zip code 94587?
Zip code 94587 in Union City, CA uses area code 408. It is located in the Pacific (PST/PDT) timezone.
Is zip code 94587 a good place to live?
Zip code 94587 (Union City, CA) has a cost of living index of 250 (100 = national average), a median household income of $137,194, and median home values of $1,058,200. The median age is 42.1. Visit the full page for demographics, climate, and nearby zip code comparisons.
What is the cost of living in zip code 94587?
The cost of living index for zip code 94587 (Union City, CA) is 250, where 100 represents the national average. This area is above the national average. Median home value: $1,058,200.
What schools serve zip code 94587?
Zip code 94587 in Union City, California is served by the local school district of Alameda County. For specific school information, check your state's department of education or GreatSchools.org.
All demographic data on this page is sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code boundary and delivery data is sourced from the United States Postal Service (USPS). Data is updated periodically and may not reflect the most current figures. Census Bureau ZIP Code Tabulation Areas (ZCTAs) may differ slightly from USPS ZIP code boundaries.
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Data Sources
- Population, income, housing, age, and demographics
- U.S. Census Bureau, American Community Survey 5-Year Estimates, 2019-2023 vintage.
- ZIP to city and county mapping
- USPS and HUD-USPS ZIP-County Crosswalk.
- Time zones and area codes
- IANA tz database and NANPA.
- Elevation
- U.S. Geological Survey National Elevation Dataset (NED), via the USGS Elevation Point Query Service. Mapped to each ZCTA centroid coordinates. Last refreshed 2026-05-19.
- Last refreshed
- 2026-05-18.