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

Cosmo is located in Duval County<1>.

While we don't have a date for the founding of Cosmo, you might consider that their post office opened in 1888.

Cosmo is 30 feet [9 m] above sea level.<2>.

Time Zone: Cosmo lies in the Eastern Time Zone (EST/EDT) and observes daylight saving time

Area Codes for Cosmo: 904 & 324<3>

Communities Also Named Cosmo ...

Using our Gazetteer, we found another community named Cosmo - it's located in Alberta.

For more information, see our Tidbits & Trivia Page for Cosmo.

Communities near Cosmo ...

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

  • Jacksonville
    (9 miles [14.5 km] to the west)
  • Jacksonville Beach
    (9 miles [14.5 km] to the southeast)
    • Jacksonville Beach is located in Duval County
    • Jump to our Gazetteer entry for Jacksonville Beach
    • Population from the 2020 Census: 23,609 people
    • Former names for Jacksonville Beach:
    • Pablo Beach
    • Ruby
    • Jump to TripAdvisor's Tourism page for Jacksonville Beach <4>
  • Atlantic Beach
    (7 miles [11.3 km] to the east)
  • Orange Park
    (17 miles [27.4 km] to the southwest)
  • Neptune Beach
    (7 miles [11.3 km] to the southeast)
  • Arlington
    (4 miles [6.4 km] to the southwest)
    • Arlington is located in Duval County
    • Jump to our Gazetteer entry for Arlington
  • Greenfield
    (4 miles [6.4 km] to the east)
    • Greenfield is located in Duval County
    • Jump to our Gazetteer entry for Greenfield
  • Mayport
    (5 miles [8 km] to the east)
    • Mayport is located in Duval County
    • Jump to our Gazetteer entry for Mayport
  • Sans Pareil
    (5 miles [8 km] to the south)
    • Sans Pareil is located in Duval County
    • Jump to our Gazetteer entry for Sans Pareil
  • Polly Town
    (6 miles [9.7 km] to the northwest)
    • Polly Town is located in Duval County
    • Jump to our Gazetteer entry for Polly Town

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 Cosmo. Our list includes the location of those cemeteries and we provide an overhead view. See our Cemetery List for Cosmo.

Using the information from an 1895 Atlas, we've created a list of communities that were in the area of Cosmo. 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 Cosmo.

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

TripAdvisor Tourism Pages for Cosmo ...

Looking for more information about Cosmo? 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.

While we are unaware of a Tourism page that is specific to Cosmo, there are neighboring communities that do have Tourism pages. A map of those communities can be found with our TripAdvisor Page for Cosmo.

Adding Cosmo to Our Gazetteer ...

We originally found mention of Cosmo 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 (so far) for Cosmo was in the document titled List of Post Offices from Cameron Blevins and Richard Helbock.<5>

From that list, the Cosmo post office opened in 1888. The Cosmo post office closed in 1897.

For more details, see References and Mentions for Cosmo.

Footnotes ...

<1>If you're interested in how the shape of Florida's counties, including Duval, have changed over time, we recommend the Atlas of Historical County Boundaries.
<2>The elevation is an estimate for the area around Cosmo - 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 904 code has been Overlayed with the 324 area code. New phone numbers in the Cosmo area will be assigned with one of these codes: 904 or 324. As a result, placing a call in the Cosmo area will require 10-digit dialing (where you enter both the area code and then the phone number).
<4>While we're fans and frequent users of TripAdvisor, you should know that we're also members of the TripAdvisor affiliate program.
<5>A copy of the Blevins & Helbock Post Office list with background information can be found at:

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