Port Costa California Map

About Port Costa, California

Port Costa is a locality in Contra Costa County, California, United States. It is a small community with a population of 296. The population density is 289.6 people per km². Port Costa is located at 38.0463°N, 122.1833°W. It observes the Pacific Time (America/Los_Angeles) timezone. ZIP code: 94569.

Port Costa clings to the southeastern curve of the Carquinez Strait, a place where the Sacramento River surrenders its fresh waters to the salty embrace of San Pablo Bay. It lies 1.4 miles west of Benicia, CA (from Benicia, CA: bearing 261°T), and is situated 9.5 miles west-north-west of Concord. Cliffs, weathered and ochre, rise sharply behind the small collection of buildings, their faces etched with the stories of wind and water. The air here carries a perpetual tang of brine, a constant reminder of the vast Pacific not far beyond. Below, the water itself is a restless, shifting mirror, reflecting the wide California sky, sometimes a steely grey, other times a brilliant, almost painful blue. Gulls wheel and cry overhead, their calls a punctuation to the low thrum of distant freighters navigating the deep channel that runs just offshore. This sliver of land was once a bustling hub, a vital terminus for the railroad and a gateway to the fertile valleys inland. Ships once crowded the waterfront, loading grain and wool, the ceaseless activity a testament to the region's agricultural bounty. Now, a quieter economy prevails, one drawn to the unique character of Port Costa, its historic buildings whispering tales of a bygone era. The old warehouses, some repurposed, others standing as weathered monuments, lend a particular, almost melancholic beauty to the waterfront, their corrugated iron roofs catching the late afternoon sun in a warm, diffused glow. Local businesses cater to those who appreciate the unvarnished charm and the persistent spirit of this place, a spirit as resilient as the sea grass that anchors the steep slopes.

About This Port Costa Map Page

This page provides an embedded street and satellite map of Port Costa, California — switch between views using the small square in the bottom left-hand corner of the map. Coordinates: 38.04631, -122.1833. Live weather conditions are sourced directly from the National Weather Service, with current observations and a 7-day forecast also powered by Open-Meteo. Real-time local news and world news feeds keep the page current, while a Wikipedia summary or an editorially written description provides background on Port Costa and Contra Costa County.

Detailed location data for Port Costa includes the ZIP code (94569), telephone area code (510), county seat of Contra Costa County (Martinez), and school district assignment (John Swett Unified School District). These are among the most commonly searched location details for any US city or town.

Location data is drawn from the USGS Geographic Names Information System (GNIS) and cross-verified against 2020 US Census records by coordinate proximity — ensuring the correct Port Costa is identified even where the name is shared across multiple counties or states. Population figures are sourced from the 2020 US Census.