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Bank · FDIC insured

1st Security Bank

A $3.2B bank, the 402nd largest of 4,207, headquartered in Mountlake Terrace, WA, with 33 branches in 2 states. Best rates: savings 0.75% APY.

1st Security Bank Carrot Score

68

Carrot Score

Higher than 22% of U.S. banks and credit unions

LowestMiddleHighest

#38 of 62 in Seattle, WA metroHow the score works →

Deposits are federally insured by the FDIC up to $250,000 per depositor.

About 1st Security Bank

Founded in 1907, 1st Security Bank of Washington serves communities across Washington and Oregon with more than 30 branch locations.

Headquarters
6920 220th St Sw, Mountlake Terrace, WA 98043
FDIC certificate
57633 ↗
Visit institution website ↗

33 branches in 2 states

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Walk-in offices from the FDIC directory as of September 4, 2026. Directions open Google Maps. A nearby branch doesn’t mean you can join or open an account.