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Summary for Jefferson

About Jefferson (Click for our profile page)

Located in: Greene County (see below)

Time Zone: Jefferson lies in the Eastern Time Zone (EST/EDT)

Telephone Area Codes: 412, 724 & 878<1>

ZIP Code: 15344<2>

Elevation: 980 feet [298.7 m] above sea level<3>

From the 2010 US Census (For more detail, see our Census Page for Jefferson)

Population

Year	Population
2019 Est:<4>	253 (6.3% decrease since 2010)
2010:	270 (19.88% decrease since 2000)
2000:	337

Total Area:<5> 0.19 sq. miles [0.5 km²]

Housing Units:<6> 141

GPS Coordinates (Latitude/Longitude)<7>

For the purpose of mapping and calculating distances, we have chosen the following reference point for Jefferson:

Lat: 39.931800° (or 39°55'54" N)

Lon: -80.057200° (or -80°3'25" W)

USGS Topo Map: Mather<8>

Federal GNIS/FIPS Codes for Jefferson

GNIS ID: 1215255

FIPS State / Place Code: 42 / 37880

(For more about Federal Codes, see our Misc Page for Jefferson)

About Greene County

The community of Waynesburg is the County Seat for {Greene County}.

From the 2010 US Census (For more detail, see our Census Page for Greene)

Population

Year	Population
2019 Est:	36,233 (6.15% decrease since 2010)
2010	38,607 (5.08% decrease since 2000)
2000:	40,672

Total Area: 577 sq. miles [1,497 km²]

Housing Units: 16,460

Official Website: https://greenecountypa.gov/

Federal GNIS/FIPS Codes for Greene

GNIS ID: 1214033

FIPS State / County Code: 42 / 059

(For more about Federal Codes, see our Misc Page for Jefferson)

About Pennsylvania

From the US Census

Population

Year	Population
2019 Est:	12,798,883 (0.76% increase since 2010)
2010:	12,702,379 (3.43% increase since 2000)
2000:	12,281,054

Websites for Commonwealth of Pennsylvania

Official Website: https://www.pa.gov/

Tourism: https://visitpa.com/

Parks: https://www.pa.gov/agencies/dcnr

Fishing: https://www.pa.gov/agencies/fishandboat

Hunting: https://www.pa.gov/agencies/pgc

Federal GNIS/FIPS Codes for Commonwealth of Pennsylvania

GNIS ID: 1779798

FIPS State: 42

(For more about Federal Codes, see our Misc Page for Jefferson)

Footnotes ...

<1>	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 Jefferson area will be assigned with one of these codes: 412, 724 or 878. As a result, placing a call in the Jefferson area will require 10-digit dialing (where you enter both the area code and then the phone number).
<2>	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 Jefferson). When looking for a ZIP Code, whether Jefferson or elsewhere, it's always best to check the website of the United States Postal Service (USPS).
<3>	The elevation is an estimate for the area around Jefferson - it will be higher in some places and lower in others.
<4>	Every year, the US Census Bureau creates a population estimate for the preceeding year. Keep in mind that this value is an estimate and not an actual count. The most recent Census estimate is for the year 2019.
<5>	The area value has been supplied by the US Census Bureau and it can be different than the geographic boundaries of Jefferson. The value given by the Census Bureau reflects their statistical (or sampling) requirements. For example, if there is a cluster of people living just outside of the community's official boundary, the Census-defined area might be expanded to include that group.
<6>	A Housing Unit is a broad term for those places where people live (whether occupied or temporarily vacant), such as a house, an apartment, a mobile home, or an area that is considered as a separate living quarter. Separate living quarters (consisting of one or more rooms) are considered to be those places where people live, sleep and eat separately from others and that have access to the outside (either directly or by a shared hallway).
<7>	Longitude & latitude values may not be the geographic center of Jefferson, rather it may be a prominent intersection or the center of population, etc. It will vary depending on the source.
<8>	Name of the USGS 7.5 Minute topographic map which includes Jefferson.