George Mann Niedecken (August 16, 1878 – November 3, 1945) was an American prairie style furniture designer and interior architect from Milwaukee, Wisconsin.

[5] Niedecken worked on eleven Wright commissions providing interior design with textiles, lighting, furniture and arts.

[7][8] The collaboration ended in 1918 when Wright opened an office in Los Angeles, and Niedecken stayed in Milwaukee.

[4] Mahony was one of the first licensed female architects in the world, and she is considered an original member of the Prairie School.

[11] In 1999 Wendy Moonan of The New York Times said, "Flea market aficionados take note: pieces by Niedecken are a new collecting category.