Anton Klaus (December 30, 1829 – July 22, 1897) was a German American immigrant, businessman, and politician.

Over the next decade, Green Bay grew to become the primary shingle market in the world, and Klaus became the largest buyer, manufacturer, and trader of the material in the United States.

[1] The Panic of 1873 virtually bankrupted Klaus, and in 1874 he moved west to settle in Jamestown, North Dakota.

He rose again in business, buying and selling buildings, land, and houses, and is considered one of the city's founders.

[2] His wife preceded him in death; they are buried together at the Allouez Catholic Cemetery in Green Bay.