Census Data for Saint Augustine

Population ...

The most recent Census Estimate<1> was for 2019 and it gave Saint Augustine a population of 15,448 people.

The last Decennial Census<2> was in 2010, which gave Saint Augustine a population of 12,975 people.

The city of Saint Augustine is located in Saint Johns County. The 2010 Census gave Saint Johns County; a population of 190,039 people. This means that Saint Augustine had 6.83% of the county's total population, making it Saint Johns' most populous community.

At the same time, Florida had a population of 18,801,310 people, meaning that Saint Augustine had 0.07% of the total population of Florida - making it the state's 138th most populous community.

Area ...

The 2010 Census shows that the sampling area for Saint Augustine has a total area of 12.76 square miles [33.1 km²]. Of this total, 9.43 square miles [24.4 km²] is land, with the balance (26.14%) being water (3.34 square miles [8.6 km²]).

Saint Johns County has a land area of 600 square miles [1,555.7 km²]. At 9.43 square miles [24.4 km²], Saint Augustine has 1.57% of the county's total land area.

• Continue Reading ...
  • When the Census Bureau conducts a census for a city like Saint Augustine, 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 city.
  • Things like population, area and housing for Saint Augustine reflect the sampling area. Since the shape of the sampling area and the actual boundaries of Saint Augustine 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:   29° 53' 45"   (or 29.9°)
  • Lon:   -81° 18' 41"   (or -81.31°)
  • 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, Saint Augustine had 6,978 Housing Units<3> and with its population of 12,975 people, this averages 1.86 people per Housing Unit.

• Continue Reading ...
  • The 2010 Census shows Saint Augustine had a land area of 9.43 square miles [24.4 km²]. This translates to 546 Housing Units per square mile [211.1 housing units/km²].
  • From the Census of 2000: Saint Augustine had 5,642 Housing Units, a population of 11,592 people and a land area of 8.37 square miles [21.7 km²]. This gives a density of 2.05 people per Housing Unit and 525 Housing Units per square mile [203.1 housing units/km²].
  • Note: Repeating the caution above (under Population Density), be aware that when comparing Housing Units between the 2010 and the 2000 Census, there were changes in the sampling area for Saint Augustine and you need to be careful when comparing results between the censuses. More information about the changes can be found in the section called Census-to-Census Observations ... (see below).

Saint Johns County ...

Saint Augustine is located in Saint Johns County<4> and is the County Seat for Saint Johns County.

The county had a population of 190,039 people at the 2010 Census. With it's population of 12,975 people, Saint Augustine represented 6.83% of the county's total.

In addition, where the city of Saint Augustine has a population density of 1,016 people per square mile [392.5 people/km²], Saint Johns County averages 316.4 people per square mile [122.2 people/km²].

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

Census-to-Census Observations ...

Introduction ...

When the Census Bureau takes a census count (or enumeration) for Saint Augustine, 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 Saint Augustine. 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 Saint Augustine 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 Saint Augustine, the latitude and longitude given by the Census Bureau actually indicates the GPS location of the polygon for Saint Augustine.

• Continue Reading ...
  • For the 2010 Census, the location was given as:
  • Lat:   29.895928°   (or 29°53'45" N)
  • Lon:   -81.311586°   (or -81°18'41" W)
  • For the 2000 Census, the location given was:
  • Lat:   29.894264°   (or 29°53'39" N)
  • Lon:   -81.313208°   (or -81°18'47" W)
  • The difference indicates that the U.S. Census Bureau moved the location of the polygon for the 2010 Census 794 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 (#2405389) to Saint Augustine. This identifier also marks a GPS point on the map, and that point lies within the boundaries of Saint Augustine. The GNIS point has been mapped to the latitude/longitude:
  • Lat:   29.897700°   (or 29°53'51" N)
  • Lon:   -81.309813°   (or -81°18'35" W)
  • The GPS location given for the 2010 Census lies 855 feet to the southwest<6> of the point given by the GNIS for Saint Augustine. For more information about this and the relationship of the various Federal Codes, please visit our Misc Page for Saint Augustine.

Miscellaneous Information for Saint Augustine ...

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 Saint Johns County or the city of Saint Augustine:

• The GNIS Codes ...
  • The current system of identification is called the Geographic Names Information System (GNIS). The following GNIS codes relate to Saint Augustine:
  • GNIS ID for Saint Augustine: 2405389
  • GNIS ID for Saint Johns County: 308371
  • GNIS ID for State of Florida: 294478

• The FIPS Codes ...
  • An earlier (and largely obsolete) identification method was called the Federal Information Processing Standard (FIPS):
  • State Code: 12 (Florida)
  • County Code: 109 (Saint Johns County)
  • Place Code: 62500 (Saint Augustine)
  • State & County Code: 12/109 (Florida / Saint Johns County)
  • State & Place Code: 12/62500 (Florida / Saint Augustine)

• Misc. Census Codes ...
  • Saint Augustine is located in Census Region #3 (the South Region) and Division #5 (the South Atlantic Division).

• The US Postal Service ZIP Code ...
  • While some people have used ZIP codes to identify a community, the ZIP codes were actually created to make mail delivery more efficient by grouping addresses together. Although a ZIP Code doesn't specifically identify a city like Saint Augustine, they do identify addresses that are in (or near) the city. It's important to remember that the boundaries of the ZIP Code can be changed, re-assigned, eliminated or overlapped with other ZIP Codes.
  • Our list of ZIP codes for Saint Augustine:<7>
  • 32084, 32085, 32092 & 32095.

• Census ZCTA Codes ...
  • The US Census Bureau created statistical entities that they call ZIP Code Tabulation Areas (ZCTAs) and these ZCTAs are frequently confused with the ZIP codes that come from the US Postal Service (USPS).
  • ZCTAs were first created for the 2000 Census and at that time, they were based upon the USPS ZIP codes. While largely covering the same areas, the boundaries of a ZCTA do not necessarily match the boundaries of a postal ZIP code with the same number. For example, while a postal ZIP code can cross a county or state line, a Census ZCTA can not. They should be treated as separate entities with no correlation between them.

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

Off-the-Road Links ...

The official website for Saint Augustine: www.ci.st-augustine.fl.us/

The official website for Saint Johns County: www.co.st-johns.fl.us/

The official website for State of Florida: www.myflorida.com/

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)