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

 
 

Historical Markers in Penngrove

 
Clickable Map of Sonoma 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 Sonoma County, CA (184) Contra Costa County, CA (487) Lake County, CA (28) Marin County, CA (258) Mendocino County, CA (46) Napa County, CA (101) Solano County, CA (130)  SonomaCounty(184) Sonoma County (184)  ContraCostaCounty(487) Contra Costa County (487)  LakeCounty(28) Lake County (28)  MarinCounty(258) Marin County (258)  MendocinoCounty(46) Mendocino County (46)  NapaCounty(101) Napa County (101)  SolanoCounty(130) Solano County (130)
Santa Rosa is the county seat for Sonoma County
Penngrove is in Sonoma County
Sonoma County (184)  ►
ADJACENT TO SONOMA COUNTY
Contra Costa County (487)  ►
Lake County (28)  ►
Marin County (258)  ►
Mendocino County (46)  ►
Napa County (101)  ►
Solano County (130)  ►
 
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1 ► California, Sonoma County, Penngrove — Penngrove —
2 ► California, Sonoma County, Penngrove — 18 — Vallejo’s Petaluma Adobe — ← 6 Miles — Reported missing
 
 
  
  
  
 
 
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Nov. 13, 2026