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Welcome to Petrolia ...

Petrolia is located in Butler County<1>.

While we don't have a date for the founding of Petrolia, you might consider that their post office opened in 1872.

From the  Census Estimates for 2019, Petrolia has a population of 198 people<2> (see below for details).

Petrolia is 1,170 feet [357 m] above sea level.<3>.

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

Area Codes for Petrolia: 412, 724 & 878<4>

The ZIP code for Petrolia: 16050<5>

Population Details ...

Taken from the 2019 Census Estimates, Petrolia had an population of 198 people. This is a decrease of 6.6% since the 2010 Census (or a decrease of 9.17% since the 2000 Census).

At the time of the 2010 Census, Petrolia had a population of 212 people. This makes Petrolia the county's 20th most populous community.

With a 2010 count of 212 people, the population of Petrolia decreased 2.75% from the 2000 Census (which had a count of 218 people).

More information can be found on the Census Page for Petrolia.

Communities Also Named Petrolia ...

Using our Gazetteer, we found that there are 7 communities that are also named Petrolia - they are located in California, Illinois, Kansas, Montana, New York, Ontario and Texas.

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

Communities near Petrolia ...

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

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

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

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

TripAdvisor Tourism Pages for Petrolia ...

Looking for more information about Petrolia? 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 Petrolia, there are neighboring communities that do have Tourism pages. A map of those communities can be found with our TripAdvisor Page for Petrolia.

Adding Petrolia to Our Gazetteer ...

We originally found mention of Petrolia 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 Petrolia was in the document titled List of Post Offices from Cameron Blevins and Richard Helbock.<7>

From that list, the Petrolia post office opened in 1872.

For more details, see References and Mentions for Petrolia.

Footnotes ...

<1>If you're interested in how the shape of Pennsylvania's counties, including Butler, have changed over time, we recommend the Atlas of Historical County Boundaries.
<2>Population counts have been provided by the U.S. Census Bureau. For more detail, please visit our Census Page for Petrolia.
<3>The elevation is an estimate for the area around Petrolia - it will be higher in some places and lower in others.
<4>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 412 code has been Overlayed with one of the following codes: 724 or 878. New phone numbers in the Petrolia area will be assigned with one of these codes: 412, 724 or 878. As a result, placing a call in the Petrolia area will require 10-digit dialing (where you enter both the area code and then the phone number).
<5>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 Petrolia). When looking for a ZIP Code, whether Petrolia or elsewhere, it's always best to check the website of the United States Postal Service (USPS).
<6>While we're fans and frequent users of TripAdvisor, you should know that we're also members of the TripAdvisor affiliate program.
<7>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/