Summary for Mill Valley
About Mill Valley (Click for our profile page)
Located in: Marin County (see below)
Typical Abbreviation: Mill Vly.
Time Zone: Mill Valley lies in the Pacific Time Zone (PST/PDT)
Telephone Area Codes: 415 & 628<1>
ZIP Codes: 94941-94942<2>
Elevation: 130 feet [39.62 m] above sea level<3>
From the 2010 US Census (For more detail, see our Census Page for Mill Valley)
Population
| Year | Population |
| 2019 Est:<4> | 14,438 (3.85% increase since 2010) |
| 2010: | 13,903 (2.23% increase since 2000) |
| 2000: | 13,600 |
Total Area:<5> 4.85 sq. miles [12.6 km²] - of which 1.73% is water (0.08 sq. miles [0.2 km²])
Housing Units:<6> 6,534
Official Website: www.cityofmillvalley.org/
GPS Coordinates (Latitude/Longitude)<7>
For the purpose of mapping and calculating distances, we have chosen the following reference point for Mill Valley:
Lat: 37.906100° (or 37°54'21" N)
Lon: -122.545400° (or -122°32'43" W)
USGS Topo Map: San Francisco and Vicinity<8>
Federal GNIS/FIPS Codes for Mill Valley
GNIS ID: 2411109
FIPS State / Place Code: 06 / 47710
(For more about Federal Codes, see our Misc Page for Mill Valley)
About Marin County
The city of San Rafael is the County Seat for Marin County.
From the 2010 US Census (For more detail, see our Census Page for Marin)
Population
| Year | Population |
| 2019 Est: | 258,826 (2.34% increase since 2010) |
| 2010 | 252,904 (2.27% increase since 2000) |
| 2000: | 247,289 |
Total Area: 828 sq. miles [2,145 km²] - of which 37.18% is water (307.9 sq. miles [797.4 km²])
Housing Units: 111,214
Official Website: www.co.marin.ca.us/
Federal GNIS/FIPS Codes for Marin
GNIS ID: 277285
FIPS State / County Code: 06 / 041
(For more about Federal Codes, see our Misc Page for Mill Valley)
About California
From the US Census
Population
| Year | Population |
| 2019 Est: | 39,437,610 (5.86% increase since 2010) |
| 2010: | 37,253,956 (9.99% increase since 2000) |
| 2000: | 33,871,648 |
Websites for State of California
Official Website: https://www.ca.gov/
Tourism: https://www.visitcalifornia.com/
Parks: https://www.parks.ca.gov/
Fishing: https://www.wildlife.ca.gov/Fishing
Hunting: https://www.wildlife.ca.gov/Hunting
Federal GNIS/FIPS Codes for State of California
GNIS ID: 1779778
FIPS State: 06
(For more about Federal Codes, see our Misc Page for Mill Valley)
Off-the-Road Links ...
The official website for Mill Valley: www.cityofmillvalley.org/
The official website for Marin County: www.co.marin.ca.us/
The official website for State of California: https://www.ca.gov/
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 415 code has been Overlayed with the 628 area code. New phone numbers in the Mill Valley area will be assigned with one of these codes: 415 or 628. As a result, placing a call in the Mill Valley 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 city (such as Mill Valley). When looking for a ZIP Code, whether Mill Valley or elsewhere, it's always best to check the website of the United States Postal Service (USPS). Our list of ZIP Codes for Mill Valley includes: 94941 & 94942. |
| <3> | The elevation is an estimate for the area around Mill Valley - 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 Mill Valley. 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 Mill Valley, 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 Mill Valley. |