First Guaranty Bank
Image:FGB HQ from west.JPG|thumb|right|250px|First Guaranty Bank's main office on East Thomas Street in Hammond, Louisiana, one block east of US 190's intersection with LA 1065.
Image:First Guaranty Bank 2010Jan12 Neill Corporation.JPG|thumb|250px|right|Former Guaranty Bank Building in Hammond's Historic District, now a Paris Parker Aveda Salon owned by Neill Corporation.
First Guaranty Bank is a bank based in Hammond, Louisiana. It is the primary subsidiary of First Guaranty Bancshares, Inc., a bank holding company. The bank operates 21 branches.
History
The bank was founded in Hammond, Louisiana in 1934 as Guaranty Bank & Trust Company.In 1971, the bank was renamed First Guaranty Bank.
In 1999, the bank acquired 13 branches from Bank One.
In 2007, the company acquired Homestead Bancorp, Inc. for $13 million in cash. It also acquired Douglass National Bank of Kansas City.
On September 22, 2011, the bank exited its participation in the Troubled Asset Relief Program by repurchasing securities from the United States Treasury for $21.1 million.
In 2017, the company acquired Premier Bancshares for $21 million in cash and stock.
In August 2019, the bank's holding company entered into a deal to purchase the holding company of The Union Bank of Marksville, Louisiana for $43 million. When completed late in 2019, the acquisition will increase the bank's number of branches by about 50% to around 30.