Westamerica Bank

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Westamerica Bank Branches by States
California

Westamerica Bank Branches by Major Cities
Fresno (5)	Santa Rosa (4)	San Rafael (3)	Novato (2)
Merced (2)	Mill Valley (2)	Petaluma (2)	Modesto (2)
Napa (2)	Sacramento (2)	Atwater (1)	Tulare (1)
Kelseyville (1)	Vallejo (1)	Clovis (1)	American Canyon (1)
Sanger (1)	Penn Valley (1)	Ukiah (1)	Turlock (1)

What is the routing number? A routing number is a nine-digit numeric code printed on the bottom of checks that is used to facilitate the electronic routing of funds (ACH transfer) from one bank account to another. It's also referred to as RTN, routing transit number or bank routing number. Read more (Enter complete or partial bank name to find details) (Enter complete or partial routing number to find details)

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