A Gazetteer for the United States and Canada

San Ramon, California

Nearby Census Genealogy
Cemeteries Tidbits &
Other CA

Learn About
The Commemorative
Quarter for
The Commemorative Quarter for California

Census Data for San Ramon ...

Population ...

The most recent Census Estimate<1> was for 2017 and it gives San Ramon a population of 75,931 people.

The last Decennial Census<2> was in 2010, giving San Ramon a population of 72,148 people.

The city of San Ramon is located in Contra Costa County. The 2010 Census gave Contra Costa County a population of 1,049,025 people. This means that San Ramon had 6.88% of the county's total population, making it Contra Costa's 4th most populous community.

At the same time, California had a population of 37,253,956 people, meaning that San Ramon had 0.19% of the total population of California - making it the state's 111st most populous community.

Area ...

When the Census Bureau conducts a census for a city like San Ramon, they draw a boundary around the area in which they are going to conduct their count - this is called a sampling area (or 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 San Ramon reflect the sampling area. Since the shape of the sampling area and the actual boundaries of San Ramon might be slightly different, it's best to check with the U.S. Census Bureau if you need precision.

The 2010 Census shows that the sample polygon for San Ramon has a total area of 18.08 square miles [46.8 km²]. Of this total, a small amount of the area is covered by water (0.02 square miles [0 km²]).

Contra Costa County has a land area of 715 square miles [1,854.3 km²]. At 18.06 square miles [46.8 km²], San Ramon has 2.52% 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 at the center of the polygon). At the time of the 2010 Census, the sampling area was located at:

Lat:   37° 45' 41"   (or 37.76°)             [Map]

Lon:   -121° 56' 15"   (or -121.94°)

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 (72,148 people) and land area (18.06 square miles [46.8 km²]) values from the 2010 Census, San Ramon had a population density of 3,991 people per square mile [1,540 people/km²].

In comparison, the 2000 Census shows San Ramon had a population of 44,722 people and a land area of 11.58 square miles [30 km²]. This gives a population density of 3,858 people per square mile [1,489 people/km²]

NOTE: Be aware that when comparing population density between the 2000 and the 2010 Census, there were changes in the sampling area for San Ramon. 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, San Ramon had 26,222 Housing Units<3> and with its population of 72,148 people, this averages 2.75 people per Housing Unit.

The 2010 Census shows San Ramon had a land area of 18.06 square miles [46.8 km²]. This translates to 1,450 Housing Units per square mile [560 housing units/km²].

From the Census of 2000: San Ramon had 17,552 Housing Units, a population of 44,722 people and a land area of 11.58 square miles [30 km²]. This gives a density of 2.55 people per Housing Unit and 1,514 Housing Units per square mile [584 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 San Ramon and you need to be careful when comparing values between the censuses. More information about the changes can be found in the section called Census-to-Census Observations ... (see below).

Contra Costa County ...

San Ramon is located in Contra Costa County.

The county had a population of 1,049,025 people at the 2010 Census. With it's population of 72,148 people, San Ramon represented 6.88% of the county's total.

In addition, where the city of San Ramon has a population density of 3,991 people per square mile [1,540 people/km²], Contra Costa County averages 1,465 people per square mile [565 people/km²].

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

Population Rings for San Ramon ...

To help identify the number of people who live in San Ramon and the surrounding area, we have drawn concentric rings centered on San Ramon. We counted the number of communities within each ring and summed their populations.<4>

  Radius   No of
  Since 2010    
5 mi   [8 km]3181,656+13.38%
10 mi   [16 km]9629,559+11.68%
15 mi   [24 km]181,317,364+10.1%
20 mi   [32 km]292,296,165+10.24%
25 mi   [40 km]504,063,957+9.63%
30 mi   [48 km]685,910,596+9.35%

Census-to-Census Observations ...

Introduction ...

When the Census Bureau takes a census count (or enumeration) for San Ramon, 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 San Ramon. 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.

Area ...

The sampling area (or polygon) given for the 2010 Census is 55.97% larger than the 2000 Census.

The 2010 Census shows that the total area for San Ramon was 18.08 square miles [46.8 km²]. Of this total, only a minor amount of the area is covered by water.

The 2000 Census shows a total area of 11.59 square miles [30 km²]. Of this total, only a minor amount of the area is covered by water.

Location ...

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

For the 2010 Census, the location was given as:

Lat:   37.761542°   (or 37°45'41" N)             [Map]

Lon:   -121.937694°   (or -121°56'15" W)

For the 2000 Census, the location given was:

Lat:   37.757350°   (or 37°45'26" N)             [Map]

Lon:   -121.952138°   (or -121°57'7" W)

The difference indicates that the U.S. Census Bureau moved the location of the polygon for the 2010 Census 4,434 feet to the east<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 (#2411805) to San Ramon. This identifier also marks a GSP point on the map, and that point lies within the boundaries of San Ramon. The GNIS point has been mapped to the latitude/longitude:

Lat:   37.761515°   (or 37°45'41" N)             [Map]

Lon:   -121.943840°   (or -121°56'37" W)

The GSP location given for the 2010 Census lies 1,771 feet to the east<6> of the point given by the GNIS for San Ramon. For more information about this and the relationship of the various Federal Codes, please visit our Misc Page for San Ramon.

Miscellaneous Information for San Ramon ...

The Federal government has assigned various identifying codes to each community, county and state. At one time or another, the US Census Bureau has referenced one (or more) of the following identifiers when referring to either Contra Costa County or the city of San Ramon:

The GNIS Codes ...

The current system of identification is called the Geographic Names Information System (GNIS). The following GNIS codes relate to San Ramon:

GNIS ID for San Ramon: 2411805

GNIS ID for Contra Costa County: 1675903

GNIS ID for California: 1779778

The FIPS Codes ...

An earlier (and largely obsolete) identification method was called the Federal Information Processing Standard (FIPS):

State Code: 06 (California)

County Code: 013 (Contra Costa County)

Place Code: 68378 (San Ramon)

State & County Code: 06/013 (California / Contra Costa County)

State & Place Code: 06/68378 (California / San Ramon)

Misc. Census Codes ...

San Ramon is located in Census Region #4 (the West Region) and Division #9 (the Pacific 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 San Ramon, it does identify addresses that are in (or near) San Ramon. 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 San Ramon: 94583<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 San Ramon.

Other Roadside Stops ...

Find a Community located in California

About Contra Costa County

About California

Off-the-Road Links ...

The official website of the U.S. Census Bureau

The official website for San Ramon:

The official website for Contra Costa County:

The official website for State of California:

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

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

Footnotes ...

<1>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 2017.

- Return to Citation

<2>Every 10 years (eg- 1990, 2000, 2010), the US Census Bureau conducts a Constitutionally-mandated count (or enumeration) of people living within the United States. This count is called a Decennial Census. The last Decennial Census was the 2010 Census, with the next one planned for 2020.

- Return to Citation

<3>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).

- Return to Citation

<4>The communities in our count are those provided by the 2010 Census, so keep in mind that our population rings will only include the people living in those communities. Smaller communities usually don't participate directly in the Census and therefore they won't be included. While our count is a close approximation, it shouldn't be considered as a complete or accurate count.

- Return to Citation

<5>The calculated bearing (or angle) to the 2010 Census location is 290 degrees and a distance of 4,434 feet.

- Return to Citation

<6>The calculated bearing (or angle) to the GNIS point is 270 degrees and a distance of 1,771 feet.

- Return to Citation

<7>When looking for a ZIP Code, whether San Ramon or elsewhere, it's always best to check the website of the United States Postal Service (USPS).

- Return to Citation


Tidbits &
Other   CA

Sitemap Privacy
of Use


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.

If you've found an error or have additional information that you would like to share, please don't hesitate to write. Click here to contact us.

Copyright 2016
All Rights Reserved
This page was last modified: 28 Oct 2018
By John Hall