The Clayton Post Office

The Clayton Post Office (HMGA5)

Location: Clayton, CA 94517 Contra Costa County
Buy California State flags at!
Country: United States of America
Buy United States of America flags at!

N 37° 56.426', W 121° 56.062'

  • 0 check ins
  • 0 favorites
The Clayton Post Office, established on October 4, 1861, is one of the oldest post offices in continuous operation in California. Ensuring its continuation in Clayton was one reason for incorporating the city in 1964.

During the past 140 years, the post office served from various locations in Clayton. The post office building on this site opened June 4, 2001.

Clayton Historical Society, 2001
HM NumberHMGA5
Series This marker is part of the Postal Mail and Philately series
Year Placed2001
Placed ByClayton Historical Society
Marker ConditionNo reports yet
Date Added Thursday, September 25th, 2014 at 2:07pm PDT -07:00
Sorry, but we don't have a picture of this historical marker yet. If you have a picture, please share it with us. It's simple to do. 1) Become a member. 2) Adopt this historical marker listing. 3) Upload the picture.
Locationbig map
UTM (WGS84 Datum)10S E 593636 N 4199741
Decimal Degrees37.94043333, -121.93436667
Degrees and Decimal MinutesN 37° 56.426', W 121° 56.062'
Degrees, Minutes and Seconds37° 56' 25.56" N, 121° 56' 3.72" W
Driving DirectionsGoogle Maps
Area Code(s)925
Closest Postal AddressAt or near 6150 Center St, Clayton CA 94517, US
Alternative Maps Google Maps, MapQuest, Bing Maps, Yahoo Maps, MSR Maps, OpenCycleMap, MyTopo Maps, OpenStreetMap

Is this marker missing? Are the coordinates wrong? Do you have additional information that you would like to share with us? If so, check in.

Nearby Markersshow on map
Check Ins  check in   |    all

Have you seen this marker? If so, check in and tell us about it.

Comments 0 comments

Maintenance Issues
  1. What historical period does the marker represent?
  2. What historical place does the marker represent?
  3. What type of marker is it?
  4. What class is the marker?
  5. What style is the marker?
  6. Does the marker have a number?
  7. This marker needs at least one picture.
  8. Can this marker be seen from the road?
  9. Is the marker in the median?