Alto, CA Profile: Facts, Map & Data


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Alto, California - Basic Facts

The Alto Census Designated Place had a population of 736 as of July 1, 2017. Alto ranks in the upper quartile for Population Density and the lower quartile for Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in California. See peer rankings below.

The primary coordinate point for Alto is located at latitude 37.9056 and longitude -122.5187 in Marin County. The formal boundaries for the Alto Census Designated Place (see map below) encompass a land area of 0.13 sq. miles and a water area of 0 sq. miles. Marin County is in the Pacific time zone (GMT -8). The elevation is 16 feet.

The Alto Census Designated Place (GNIS ID: 2582933) has a U1 Census Class Code which indicates a census designated place with an official federally recognized name. It also has a Functional Status Code of "S" which identifies a statistical entity.

California is one of 20 states where Census County Divisions (CCDs) are used for statistical tracking of subdivisions within each county. The Alto Census Designated Place is located within Southeast Marin CCD of Marin County.

Beneath the boundary map are tables with Alto population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2017.

Alternate Unofficial Names for Alto: Blithedale.

Neighborhood Data

Address Based Hyperlocal Data Input an address and get data & demographics for the pertinent census block group (CBG), a searchable map and a customized directory. The CBG is the smallest geographical unit used by the Census Bureau for reporting certain data.


Alto Census Designated Place, CA Boundary Map

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Alto, CA Data & Demographics (As of July 1, 2017)


Total Population 736
Daytime Population: Workers 96
Daytime Population: Residents 362
Total Daytime Population (TDP) 458
Ratio TDP/Total Population1 0.62
Population in Households 736
Population in Familes 602
Population in Group Qrtrs 0
Population Density2 5,855
Diversity Index3 37


Median Household Income $108,322
Average Household Income $178,950
Per Capita Income $72,051


Total Housing Units 323 (100%)
Owner Occupied HU 207 (64.1%)
Renter Occupied HU 100 (31.0%)
Vacant Housing Units 17 ( 5.3%)
Median Home Value $1,000,001
Average Home Value $1,129,928


Total Households 306
Average Household Size 2.41
Family Households 204
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2017 2017-2022
Population 0.48% 0.51%
Households 0.41% 0.45%
Families 1.74% 0.39%
Median Household Income   4.44%
Per Capita Income   2.33%

Alto, CA - Peer Comparisons by Rank and Percentile

The table below compares Alto to the other 1,516 incorporated cities, towns and CDPs in California by rank and percentile using July 1, 2017 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 1111 27th
Population Density # 191 87th
Diversity Index # 1251 18th
Median Household Income # 124 92nd
Per Capita Income # 72 95th

Additional comparisons and rankings can be made with a VERY EASY TO USE California Census Data Comparison Tool.

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