Security First Bank is a Nebraska-chartered, privately-held bank with 26 branch locations and 12 insurance offices throughout Nebraska and southwest South Dakota. We provide community banking services from the farm and ranch towns in rural Nebraska to the hub cities of Lincoln and Rapid City. Security First believes that attention to detail, flexible and innovative services and remarkable customer care are the pillars of successful community banking, and we've been committed to those standards since our founding in 1898. Member FDIC. Equal Housing Lender.