A Gazetteer for the United States and Canada
Census Data for Sonora ...
The most recent Census Estimate<1> was for 2018 and it gave Sonora a population of 2,762 people.
The last Decennial Census<2> was in 2010, which gave Sonora a population of 3,027 people.
The city of Sonora is located in Sutton County. The 2010 Census gave Sutton County a population of 4,128 people. This means that Sonora had 73.3% of the county's total population, making it Sutton's most populous community.
When the Census Bureau conducts a census for a city like Sonora, they draw a boundary around the area in which they are going to conduct their count - this defines the sampling area (usually shaped as 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 the population, area and housing for Sonora reflect the sampling area. Since the shape of the sampling area and the actual boundaries of Sonora might be different, it's best to check with the U.S. Census Bureau to resolve any difference between the two.
The 2010 Census shows that the sampling area for Sonora has a total area of 2.05 square miles [5.3 km²].
Sutton County has a land area of 1,453 square miles [3,765.7 km²]. At 2.05 square miles [5.3 km²], Sonora has 0.14% of the county's total land area.
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: 30° 34' 14" (or 30.57°) [Map]
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).
Population Density ...
Using the population (3,027 people) and land area (2.05 square miles [5.3 km²]) values from the 2010 Census, Sonora had a population density of 1,476 people per square mile [570 people/km²].
In comparison, the 2000 Census shows Sonora had a population of 2,924 people and a land area of 1.96 square miles [5.1 km²]. This gives a population density of 1,488 people per square mile [574 people/km²]
NOTE: Be aware that when comparing population density between the 2000 Census and the 2010 Census, there were changes in the sampling area for Sonora. You need to be careful when making such a comparison, the differences are likely to lead to a misleading comparison. More information about the nature of these differences can be found in the section Census-to-Census Observations ... (see below).
Housing Units ...
At the time of the 2010 Census, Sonora had 1,323 Housing Units<3> and with its population of 3,027 people, this averages 2.29 people per Housing Unit.
The 2010 Census shows Sonora had a land area of 2.05 square miles [5.3 km²]. This translates to 645 Housing Units per square mile [249.2 housing units/km²].
From the Census of 2000: Sonora had 1,264 Housing Units, a population of 2,924 people and a land area of 1.96 square miles [5.1 km²]. This gives a density of 2.31 people per Housing Unit and 643 Housing Units per square mile [248.5 housing units/km²].
NOTE: Repeating the caution above (under Population Density), be aware that when comparing Housing Units between the 2000 Census and the 2010 Census, there were changes in the sampling area for Sonora and you need to be careful when comparing values between the censuses. More information about these differences can be found in the section called Census-to-Census Observations ... (see below).
Sutton County ...
The county had a population of 4,128 people at the 2010 Census. With it's population of 3,027 people, Sonora represented 73.3% of the county's total.
In addition, where the city of Sonora has a population density of 1,476 people per square mile [570 people/km²], Sutton County averages 2.84 people per square mile [1.1 people/km²].
For more information, please visit our Census Page for Sutton County.
Population Rings for Sonora ...
To help identify the number of people who live in Sonora and the surrounding area, we have drawn concentric rings centered on Sonora. We counted the number of communities within each ring and summed their populations.<4>
Census-to-Census Observations ...
When the Census Bureau takes a census count (or enumeration) for Sonora, 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 Sonora. It's important to note that from one Census to the next, the shape and location of the polygon can change. If you need precision or details about the methodology of the Census, you should visit the U.S. Census Bureau for a definitive answer.
The sampling area (or polygon) given for the 2010 Census is 4.38% larger than the 2000 Census.
The 2010 Census shows that the total area for Sonora was 2.05 square miles [5.3 km²]. Of this total, only a minor amount of the area is covered by water.
The 2000 Census shows a total area of 1.96 square miles [5.1 km²]. Of this total, only a minor amount of the area is covered by water.
While generally coinciding with the GPS location (latitude/longitude) of Sonora, the latitude and longitude given by the Census Bureau actually indicates the GPS location of the polygon for Sonora.
For the 2010 Census, the location was given as:
Lat: 30.570759° (or 30°34'14" N) [Map]
For the 2000 Census, the location given was:
Lat: 30.568166° (or 30°34'5" N) [Map]
The difference indicates that the U.S. Census Bureau moved the location of the polygon for the 2010 Census 947 feet to the north<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 (#2411931) to Sonora. This identifier also marks a GSP point on the map, and that point lies within the boundaries of Sonora. The GNIS point has been mapped to the latitude/longitude:
Lat: 30.570944° (or 30°34'15" N) [Map]
The GSP location given for the 2010 Census lies 174.6 feet to the east<6> of the point given by the GNIS for Sonora. For more information about this and the relationship of the various Federal Codes, please visit our Misc Page for Sonora.
Miscellaneous Information for Sonora ...
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 Sutton County or the city of Sonora:
The GNIS Codes ...
The current system of identification is called the Geographic Names Information System (GNIS). The following GNIS codes relate to Sonora:
GNIS ID for Sonora: 2411931
The FIPS Codes ...
An earlier (and largely obsolete) identification method was called the Federal Information Processing Standard (FIPS):
State Code: 48 (Texas)
County Code: 435 (Sutton County)
Place Code: 68756 (Sonora)
Misc. Census Codes ...
Sonora is located in Census Region #3 (the South Region) and Division #7 (the West South-Central Division).
The US Postal Service ZIP Code ...
While some people have used a ZIP code to identify a community, the purpose of the ZIP code was to make mail delivery more efficient by grouping addresses together. Although the ZIP Code doesn't specifically identify a city like Sonora, it does identify addresses that are in (or near) Sonora. It's important to remember that the boundaries of a ZIP Code can be changed, re-assigned or overlapped with other ZIP Codes.
The ZIP code for Sonora: 76950<7>
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 Sonora.
Other Roadside Stops ...
Off-the-Road Links ...
The official website of the U.S. Census Bureau
The official website for Sonora: www.sonora-texas.com/
The official website for State of Texas: https://texas.gov/
The official website of the U.S. Board on Geographic Names (BGN)
The official website of the U.S. Geological Survey (USGS)
Please keep in mind that we can not guarantee the accuracy or timeliness of the information on this website, so use with care. We encourage you to double-check the information that is critical to you.
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This page was last modified: 18 Nov 2019