Bank of the Southwest, Las Cruces Branch Basic Info Reviews Routing Numbers Map & Direction Name: Bank of the Southwest, Las Cruces Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 605 N. Water Street Las Cruces, New Mexico 88001 Dona Ana County View other branches Phone: 505-521-8200 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer111003585YN112206297YY From: To: