NBT National Bank & Trust - A Texas Tradition Since 1888 - La Grange, Texas. (979) 968-3136 or (800) 330-3136 - The Bank with a professional attitude and hometown friendliness! National Bank & Trust, located at 145 West Colorado Street in La Grange, Texas, has been a major factor in the development and expansion of the business and agricultural communities of this area since 1888. National Bank & Trust is a full service Bank with friendly people who take the time to listen and talk with customers about their banking needs.