Southwestern National Bank  is an overseas Chinese bank in the United States with headquarters in Chinatown and in Greater Sharpstown in Houston, Texas. Other Texas branches include Plano, Texas, Richardson, Texas, Austin, Texas and Sugar Land, Texas, this privately held community bank was founded on November 3, 1997.
The location of Southwestern National Bank in the south reflects one of the newest trends of Chinese American and Asian American population diffusion into areas other than the traditional regions settled by Asian Americans, such as the western United States and northeastern United States. The establishment of this bank was in accompany with the booming economy of the late 1990s of Chinatown, Houston and also the Telecom Corridor (Silicon Prairie) in suburban Dallas, Texas. These two trends attracted a significant amount of Chinese / Asian scientists, engineers, immigrants, businessman, and real estate investors into the area.
In addition to the traditional Chinese clients, a significant number of the ethnic minority clients of Southwestern National Bank are Hoa (Chinese Vietnamese), Indian, and Vietnamese, and the bank was consequently among the first banks to offer the service of Vietnam money remittance in its international banking business.
 
Subsidiaries and affiliates
Nevada National Bank
In June 2007 SWNB Bancorp Inc.,the holding company for Southwestern National Bank unveiled its newest subsidiary, Nevada National Bank which is headquartered in Las Vegas, Nevada. There are currently 2 locations in Las Vegas, Nevada.
 

Type	Private
Industry	Finance
Founded	1997
Headquarters	Houston, Texas
Products	Banking
Revenue	N/A (Asset = $ 341.538 million)
Employees	100
Parent	SWNB Bancorp Inc.
Subsidiaries	Nevada National Bank
Website	www.swnbk.com