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Walnut, California
City of Walnut
View of Mt. San Antonio College and surrounding area
View of Mt. San Antonio College and surrounding area
Location of Walnut in Los Angeles County, California
Location of Walnut in Los Angeles County, California
Walnut, California is located in the United States
Walnut, California
Walnut, California
Location in the United States
Coordinates: 34°2′N 117°52′W / 34.033°N 117.867°W / 34.033; -117.867Coordinates: 34°2′N 117°52′W / 34.033°N 117.867°W / 34.033; -117.867
Country  United States of America
State  California
County Los Angeles
Incorporated (city) January 19, 1959[1]
Government
 • Mayor Nancy Tragarz[2]
 • Mayor Pro Tem Andrew Rodriguez[2]
 • Council Member Robert Pacheco[2]
 • Council Member Eric Ching[2]
 • Council Member Mary Su[2]
Area
 • Total 9.00 sq mi (23.30 km2)
 • Land 8.99 sq mi (23.29 km2)
 • Water 0.00 sq mi (0.01 km2)  0.04%
Elevation 561 ft (171 m)
Population
 (2010)[5]
 • Total 29,172
 • Estimate 
(2017)[6]
30,199
 • Density 3,359.18/sq mi (1,296.65/km2)
Time zone UTC-8 (PST)
 • Summer (DST) UTC-7 (PDT)
ZIP Codes
91788, 91789, 91795[7]
Area code(s) 909, 626
FIPS code 06-83332
GNIS feature IDs 1652808, 2412173
Website www.ci.walnut.ca.us