Community Guide 2017
Valley Population and Housing
The population of the San Geronimo Valley grew by nearly 600 people between 1980 and 2000, but remained relatively unchanged from 2000 to 2015.
In 2015 nearly half of the Valley population in lived in Woodacre. In addition to the 3,707 Valley residents, an estimated 747 people lived within the boundaries of the Nicasio ZIP code.
Population in San Geronimo Valley Zip Codes and Nicasio
Geography
Total population Male Female Median age (years) Total housing units
Census Tract 1130 San Geronimo Valley
3707
1762 1945 406 406 287 349 327 374 821 832 347 400
52.3 years 47.6 years 40.2 years 42.4 years 55.8 years 52.4 years
1776
Zip Code 94933 Forest Knolls Zip Code 94938 Lagunitas Zip Code 94963 San Geronimo Zip Code 94973 Woodacre
812 636 701
342 382 269 799 369
1653
Zip Code 94946 Nicasio
747
There were significant changes in the age distribution of the Valley population. San Geronimo Valley
Change in Valley Population by Age, 1980 – 2015
Under 5 Years 5-19 years 20-64 years
-145
-90
74
65 years and over
668
Total population
507
-200 -100 0 100 200 300 400 500 600 700
48
SGVCC
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