THE HISTORICAL
MARKER DATABASE
“Bite-Size Bits of Local, National, and Global History”
 
 
 
 
 
 
2 entries match your criteria.  

 
 

Historical Markers in Port Costa

 
Clickable Map of Contra Costa County, California and Immediately Adjacent Jurisdictions image/svg+xml 2019-10-06 U.S. Census Bureau, Abe.suleiman; Lokal_Profil; HMdb.org; J.J.Prats/dc:title> https://commons.wikimedia.org/wiki/File:Usa_counties_large.svg Contra Costa County, CA (487) Alameda County, CA (688) Marin County, CA (258) Sacramento County, CA (450) San Francisco County, CA (755) San Joaquin County, CA (150) Solano County, CA (130) Sonoma County, CA (180)  ContraCostaCounty(487) Contra Costa County (487)  AlamedaCounty(688) Alameda County (688)  MarinCounty(258) Marin County (258)  SacramentoCounty(450) Sacramento County (450)  (755) San Francisco City and County (755)  SanJoaquinCounty(150) San Joaquin County (150)  SolanoCounty(130) Solano County (130)  SonomaCounty(180) Sonoma County (180)
Martinez is the county seat for Contra Costa County
Port Costa is in Contra Costa County
Contra Costa County (487)  ►
ADJACENT TO CONTRA COSTA COUNTY
Alameda County (688)  ►
Marin County (258)  ►
Sacramento County (450)  ►
San Francisco City and County (755)  ►
San Joaquin County (150)  ►
Solano County (130)  ►
Sonoma County (180)  ►
 
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1 ► California, Contra Costa County, Port Costa — The Burlington Hotel — Established 1883 —
On Canyon Lake Drive, on the left when traveling north.
2 ► California, Contra Costa County, Port Costa — McNear Warehouse —
On Canyon Lake Drive near Erskine Street, on the right when traveling north.
 
 
  
  
  
 
 
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Nov. 11, 2026