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Contact Us

Your Client Service Specialists can be reached directly at the National Service Center: 

P:  866.355.0468 (8:00 am to 8:00 pm Eastern)  
F:  866.355.7099 or 919.314.3080

Square 1 Financial
406 Blackwell Street, Suite 240
Durham, North Carolina 27701  

Outside of traditional business hours, please send an email to nsc@square1bank.com,
and someone will respond to you shortly. 

Square 1 serves its customers from ten locations throughout the country. Each is strategically located in the premier growth corridors. 

Scroll over a location to learn more about that region, or you may also use the dropdown menu.

Northern California

>> Silicon Valley Office
2420 Sand Hill Road, Ste 100
Menlo Park, CA 94025
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P  650.543.2700
F  650.543.2780

>> Campbell Office
51 E Campbell Ave, Ste 141B
Campbell, CA 95008
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P  408.447.8533
F  877.447.8530

>> Bay Area Office
500 2nd Street, 2nd Floor
San Francisco, CA 94107
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This location is not a branch. No banking transactions are available at this location.

 

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Pacific Northwest

403 Columbia Street
Suite 410
Seattle, WA 98104
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P  206.812.4254
F  206.812.4253

This location is not a branch. No banking transactions are available at this location.

 

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Rocky Mountains

1899 Wynkoop Street
Suite 325
Denver, CO 80202
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P  303.938.3097
F  303.938.3099

This location is not a branch. No banking transactions are available at this location.

 

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Pacific Southwest

>> San Diego Office
12481 High Bluff Drive, Ste 350
San Diego, CA 92130
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P  858.436.3500 
F  858.436.3501

>> Los Angeles Office
233 Wilshire Blvd., Ste 320
Santa Monica, CA 90401
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 310.883.7144 
F  310.361.7686

>> Orange County Office
120 Vantis Dr., Ste 300, #54
Aliso Viejo, CA 92656
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P  949.290.3030

This location is not a branch. No banking transactions are available at this location.

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Texas

901 South Mopac Expressway
Barton Oaks Plaza Two
Suite 420
Austin, TX 78746
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P  512.439.2830
F  512.439.2829

This location is not a branch. No banking transactions are available at this location.

 

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Southeast

406 Blackwell Street
Suite 240
Durham, NC 27701
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P  919.314.3040
F  919.314.3110

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Mid-Atlantic

2 Wisconsin Circle
Suite 920
Chevy Chase, MD 20815
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P  703.962.6623
F  703.448.1849

This location is not a branch. No banking transactions are available at this location.

 

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New York

475 Fifth Avenue
18th Floor
New York, NY 10017
(Entrance on 41st Street) 
+ map

P  646.336.4965
F  646.336.4961

This location is not a branch. No banking transactions are available at this location.

 

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New England

890 Winter Street
Suite 110
Waltham, MA 02451
+ map

P  781.547.0847
F  781.547.0848

This location is not a branch. No banking transactions are available at this location.

 

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