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 190. The population density is 464.3 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 defines the edge where the land yields to the heavy, salt-thick air of the Pacific Ocean. It lies 1.4 miles west of Benicia, CA (from Benicia, CA: bearing 261°T), and is situated 9.5 miles west-northwest of Concord. This terminal point sits within the bowl of Big Bull Valley, where the terrain rises in dry, tawny folds that catch the long, slanted light of the afternoon. To the west, the horizon holds the faint, jagged silhouette of the Coast Ranges, standing as a distant boundary against the sky. The immediate surroundings are defined by the Carquinez Strait Regional Shoreline, a landscape of raw earth and scrub that feels weathered by the persistent, shifting tides of the Pacific Ocean. Even the nearby Pacific Ocean—a small, seasonal catchment—reflects the muted, gray-blue tones of a sky that rarely stays clear for long.

Port Costa bears the quiet weight of a maritime history that once relied on the deep-water access provided by the wide, moving channel. Where wheat elevators and bustling rail yards once formed the economic pulse of the shoreline, now only the skeletal remains of industry linger, repurposed into the quiet, eclectic life of the modern neighborhood. The pace here moves with the slow, deliberate rhythm of the water, far removed from the frantic pace of the nearby inland centers. Travelers might find their way toward the paths of the Carquinez Strait Regional Shoreline, or simply watch the fog drift in from the Pacific Ocean, obscuring the distant cranes of Mare Island across the water. Life in Port Costa maintains a stubborn, singular character, shaped by the memory of ships and the slow encroachment of the wild hills that rise toward the horizon.

About This Port Costa Map Page

This page provides an embedded street and satellite map of Port Costa, California. Coordinates: 38.04631, -122.1833. Live weather conditions are sourced directly from the National Weather Service. Real-time local and world news feeds keep the page current.

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).

Location data is drawn from the USGS Geographic Names Information System (GNIS) and cross-verified against 2020 US Census records by coordinate proximity. Population figures are sourced from the 2020 US Census.