RoadsideThoughts
A Gazetteer for the United States and Canada
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Welcome to Monte Rio ...

Monte Rio is located in Sonoma County<1>.

While we don't have a date for the founding of Monte Rio, you might consider that their post office opened  in 1924.

Monte Rio is 40 feet [12 m] above sea level.<2>.

Time Zone: Monte Rio lies in the Pacific Time Zone (PST/PDT) and observes daylight saving time

Area Codes for Monte Rio: 707 & 369<3>

The ZIP code for Monte Rio: 95462<4>

Communities near Monte Rio ...

We have created a list of 10 communities that are near Monte Rio.

To Help With Your Genealogy Research ...

We have a couple of sections for those tracing their genealogy.

We created a list of cemeteries that are in the area around Monte Rio. Our list includes the location of those cemeteries and we provide an overhead view. See our Cemetery List for Monte Rio.

Using the information from an 1895 Atlas, we've created a list of communities that were in the area of Monte Rio. Our list includes information such as whether the 1895 community had a post office or railroad service. See our List of 1890's Communities around Monte Rio.

We also have a detailed list of newspapers that have been published in the area around Monte Rio. See our Newspapers Page for Monte Rio.

TripAdvisor Tourism Pages for Monte Rio ...

Looking for more information about Monte Rio? A wonderful source is the TripAdvisor website. We always start with the TripAdvisor Tourism page, where you can read an overview with links that will help you find lodging, restaurants and attractions.

In addition to the Tourism page for Monte Rio, there are neighboring communities that also have Tourism pages. More information about those communities can be found on our TripAdvisor Page for Monte Rio.

Adding Monte Rio to Our Gazetteer ...

We originally found mention of Monte Rio in both the FIPS-55 and the GNIS. For more information, see the FIPS and GNIS Codes sections on our Miscellaneous Page.

From our notes, the earliest published mention we've found for Monte Rio was in the document titled List of Post Offices from Cameron Blevins and Richard Helbock.<6>

From that list, the Monte Rio post office opened in 1924.

We also found Monte Rio mentioned on a train schedule titled Southern Pacific Railroad Time Tables (July 1929).

For more details, see References and Mentions for Monte Rio.

Footnotes ...

<1>If you're interested in how the shape of California's counties, including Sonoma, have changed over time, we recommend the Atlas of Historical County Boundaries.
<2>The elevation is an estimate for the area around Monte Rio - it will be higher in some places and lower in others.
<3>When there's a risk of an area code running out of phone numbers, an 'Overlay Area Code' is created that has the same geographic boundaries as the existing area code. In this case, the 707 code has been Overlayed with the 369 area code. New phone numbers in the Monte Rio area will be assigned with one of these codes: 707 or 369. As a result, placing a call in the Monte Rio area will require 10-digit dialing (where you enter both the area code and then the phone number).
<4>ZIP Codes have been created by the United States Postal Service (USPS) as a way of grouping addresses to make delivery more efficient. The boundaries of the ZIP Code can be changed, re-assigned, eliminated or overlapped with other ZIP Codes. So keep in mind that any given ZIP Code is only 'loosely' associated with a community (such as Monte Rio). When looking for a ZIP Code, whether Monte Rio or elsewhere, it's always best to check the website of the United States Postal Service (USPS).
<5>While we're fans and frequent users of TripAdvisor, you should know that we're also members of the TripAdvisor affiliate program.
<6>A copy of their list with background information can be found at:

      https://cblevins.github.io/us-post-offices/data-biography/