Born March 17, 1855 in Illinois, he came to Hutchinson in 1886 from Topeka Kansas where he worked for the Kansas Loan and Trust Co. He set up business over the First National Bank in the title business and was soon Vice President of the Inter-State Investment Co..  Ben Blanchard President.  Several years later he became a loan agent at the Valley State Bank.

In 1902, he offered a building site to the library board at 5th and Main and the historic  Carnegie Library building still remains there as a testament to his generosity and supporter of the library.  Mrs. (Ella Spencer Brown) Bunker served on the library board and they remained continuous strong supporters of the library.

In 1908, L.A. Bunker sold his Fire Insurance business to Sweet and Coe.

The Bunkers purchased a winter home in Long Beach California and Louis Arthur Bunker passed away there in 1921.  He left $5,000 to the library for the purchase of books and $10,000 for city parks. Mrs. Bunker sold the home and returned to Hutchinson until her passing in 1924.