Knoll, Inc is a design firm that produces office systems, seating, files and storage, tables and desks, textiles (KnollTextiles), and accessories for the office, home, and higher education settings. The company manufactures furniture for the home by Ludwig Mies van der Rohe, Harry Bertoia, Florence Knoll (Florence Schust), Frank Gehry, Maya Lin and Eero Saarinen under the company's KnollStudio division. Over 40 Knoll designs can be found in the permanent design collection of The Museum of Modern Art in New York City.

The company was founded in New York City in 1938 by Hans Knoll. Production facilities were moved to Pennsylvania in 1950. After the death of Hans in 1955, his wife Florence Knoll took over as head of the company. The company is headquartered in East Greenville, Pennsylvania and has manufacturing sites in North America (East Greenville, Grand Rapids, Muskegon, and Toronto) and Italy (Foligno and Graffignana). In addition, the company is listed on the New York Stock Exchange (NYSE) and trades under the symbol:KNL.

In 2011, Knoll received the National Design Award for Corporate and Institutional Achievement from the Cooper Hewitt, Smithsonian Design Museum.

Many noteworthy designers have done work for Knoll, including:

Many of the company's product are included in museum collections, such as the Cooper-Hewitt, National Design Museum.

Knoll sponsors exhibitions, scholarships, and other activities related to Modernist architecture and design. In 2006, Knoll and the World Monuments Fund, a New York-based non-profit organization, launched Modernism at Risk, an advocacy and conservation program. Modernism at Risk encourages design solutions for at risk Modernist buildings, provides funding for conservation projects, and raises awareness of the threats to Modernist architecture through exhibitions and lectures.

The World Monuments Fund/Knoll Modernism Prize is awarded every two years to projects that preserve Modernist architecture.

In 2008, the first Knoll Modernism award was given to Winfried Brenne and Franz Jaschke of the German firm Brenne Gesellschaft von Architekten for the restoration of the former ADGB Trade Union School building on the outskirts of Berlin. The school, built between 1928 and 1930, was a project of the Bauhaus design school. The architects were Hannes Meyer, then director of the Bauhaus, and Hans Wittwer.

The 2010 prize went to Hubert-Jan Henket and Wessel de Jonge, the founders of Docomomo International, for the restoration of Zonnestraal Sanatorium (estate) in Hilversum, The Netherlands. The 2012 prize was given to a consortium of Japanese architects and academics for the restoration of the 1950s Hizuchi Elementary School on Shikoku island, Japan.