Census Data for Union City

Population ...

The most recent Census Estimate<1> was for 2019 and it gave Union City a population of 3,115 people.

The last Decennial Census<2> was in 2010, which gave Union City a population of 3,320 people.

The community of Union City is located in Erie County. The 2010 Census gave Erie County; a population of 280,566 people. This means that Union City had 1.18% of the county's total population, making it Erie's 6th most populous community.

At the same time, Pennsylvania had a population of 12,702,379 people, meaning that Union City had 0.03% of the total population of Pennsylvania - making it the state's 292nd most populous community.

Area ...

The 2010 Census shows that the sampling area for Union City has a total area of 1.86 square miles [4.8 km²]. Of this total, 1.83 square miles [4.7 km²] is land, with the balance (1.35%) being water (0.03 square miles [0.1 km²]).

Erie County has a land area of 799 square miles [2,069.8 km²]. At 1.83 square miles [4.7 km²], Union City has 0.23% of the county's total land area.

• Continue Reading ...
  • When the Census Bureau conducts a census for a community like Union City, they draw a boundary around the area in which they are going to conduct their count - this defines the sampling area (usually a polygon). The shape of the sampling area can be quite complex and it's important to keep in mind that the boundaries of the sampling area may or may not match the recognized boundaries of the community.
  • Things like population, area and housing for Union City reflect the sampling area. Since the shape of the sampling area and the actual boundaries of Union City might be different, it's best to check with the U.S. Census Bureau to resolve any difference between the two.
  • Not only does the sampling area define boundaries, it also has a GPS location (latitude & longitude) that indicates a point within the sampling area (usually the center of the polygon, known as the centroid). At the time of the 2010 Census, the sampling area was located at:
  • Lat:   41° 53' 51"   (or 41.9°)
  • Lon:   -79° 50' 35"   (or -79.84°)
  • More information on this topic and the changes between the 2000 Census and the 2010 Census can be found in the section for our Census-to-Census Observations ... (see below).

Housing Units ...

At the time of the 2010 Census, Union City had 1,402 Housing Units<3> and with its population of 3,320 people, this averages 2.37 people per Housing Unit.

• Continue Reading ...
  • The 2010 Census shows Union City had a land area of 1.83 square miles [4.7 km²]. This translates to 755 Housing Units per square mile [291.8 housing units/km²].
  • From the Census of 2000: Union City had 1,422 Housing Units, a population of 3,463 people and a land area of 1.87 square miles [4.9 km²]. This gives a density of 2.44 people per Housing Unit and 759 Housing Units per square mile [293.1 housing units/km²].
  • Note: Repeating the caution above (under Population Density), be aware that when comparing Housing Units between the 2010 Census and the 2000 Census, there were changes in the sampling area for Union City and you need to be careful when comparing numbers between the censuses. More information about these differences can be found in the section called Census-to-Census Observations ... (see below).

Erie County ...

Union City is located in Erie County<4>.

The county had a population of 280,566 people at the 2010 Census. With it's population of 3,320 people, Union City represented 1.18% of the county's total.

In addition, where the community of Union City has a population density of 1,789 people per square mile [691 people/km²], Erie County averages 351.1 people per square mile [135.6 people/km²].

For more information, please visit our Census Page for Erie County.

Census-to-Census Observations ...

Introduction ...

When the Census Bureau takes a census count (or enumeration) for Union City, they start by specifying the boundaries of the area to be counted. This area (or sampling area) is a polygon and its shape can be quite complex - it may or may not match the geographical boundaries of Union City. It's important to note that from one Census to the next, the shape and location of the polygon can change.

• Continue Reading ...
  • Although we don't have specific information about the shape of the polygon for Union City or how it changed has over time, there is some information that can give us some hints. For example, since the shape of the sampling area is directly related to the shape of the polygon, any change to area probably indicates a new shape for the polygon.
  • If you need precision or details about the methodology of the Census, you should visit the U.S. Census Bureau for a definitive answer.

Location ...

While generally coinciding with the GPS location (latitude/longitude) of Union City, the latitude and longitude given by the Census Bureau actually indicates the GPS location of the polygon for Union City.

• Continue Reading ...
  • For the 2010 Census, the location was given as:
  • Lat:   41.897664°   (or 41°53'51" N)
  • Lon:   -79.843218°   (or -79°50'35" W)
  • For the 2000 Census, the location given was:
  • Lat:   41.896056°   (or 41°53'45" N)
  • Lon:   -79.844425°   (or -79°50'39" W)
  • The difference indicates that the U.S. Census Bureau moved the location of the polygon for the 2010 Census 671 feet to the northeast<5> of the location that was used in the 2000 Census.
  • The U.S. Geological Survey (USGS) and the U.S. Board on Geographic Names (BGN) have assigned a unique GNIS identifier (#1215218) to Union City. This identifier also marks a GPS point on the map, and that point lies within the boundaries of Union City. The GNIS point has been mapped to the latitude/longitude:
  • Lat:   41.893111°   (or 41°53'35" N)
  • Lon:   -79.848108°   (or -79°50'53" W)
  • The GPS location given for the 2010 Census lies 2,125 feet to the northeast<6> of the point given by the GNIS for Union City. For more information about this and the relationship of the various Federal Codes, please visit our Misc Page for Union City.

Miscellaneous Information for Union City ...

The Federal government has assigned various identifying codes to each community, county and state. At one time or another, the US Census Bureau has used one (or more) of the following identifiers when referring to either Erie County or the community of Union City:

• The GNIS Codes ...
  • The current system of identification is called the Geographic Names Information System (GNIS). The following GNIS codes relate to Union City:
  • GNIS ID for Union City: 1215218
  • GNIS ID for Erie County: 1209178
  • GNIS ID for State of Pennsylvania: 1779798

• The FIPS Codes ...
  • An earlier (and largely obsolete) identification method was called the Federal Information Processing Standard (FIPS):
  • State Code: 42 (Pennsylvania)
  • County Code: 049 (Erie County)
  • Place Code: 78448 (Union City)
  • State & County Code: 42/049 (Pennsylvania / Erie County)
  • State & Place Code: 42/78448 (Pennsylvania / Union City)

• Misc. Census Codes ...
  • Union City is located in Census Region #1 (the Northeast Region) and Division #2 (the Middle Atlantic Division).

For more information about the various Federal identification codes, please visit our Misc Page for Union City.

Off-the-Road Links ...

Unfortunately, we don't know of a website for Union City. If you can help, please contact us through our Feedback Page.

The official website for Erie County: www.eriecountygov.org/

The official website for State of Pennsylvania: https://www.pa.gov/

The official website of the U.S. Census Bureau

The official website of the U.S. Board on Geographic Names (BGN)

The official website of the U.S. Geological Survey (USGS)