Tiffany glass refers to the many and varied types of glass developed and produced from 1878 to 1933 at the Tiffany Studios, by Louis Comfort Tiffany.

In 1865, Tiffany traveled to Europe, and in London he visited the Victoria and Albert Museum, whose extensive collection of Roman and Syrian glass made a deep impression on him. He admired the coloration of medieval glass and was convinced that the quality of contemporary glass could be improved upon. In his own words, the "Rich tones are due in part to the use of pot metal full of impurities, and in part to the uneven thickness of the glass, but still more because the glass maker of that day abstained from the use of paint".

Tiffany was an interior designer, and in 1878 his interest turned towards the creation of stained glass, when he opened his own studio and glass foundry because he was unable to find the types of glass that he desired in interior decoration. His inventiveness both as a designer of windows and as a producer of the material with which to create them was to become renowned. Tiffany wanted the glass itself to transmit texture and rich colors and he developed a type of glass he called Favrile.

Louis Comfort Tiffany (February 18, 1848 – January 17, 1933) was an American artist and designer who worked in the decorative arts and is best known for his work in stained glass. He is the American artist most associated with the Art Nouveau  and Aesthetic movements. Tiffany was affiliated with a prestigious collaborative of designers known as the Associated Artists, which included Lockwood de Forest, Candace Wheeler, and Samuel Colman. Tiffany designed stained glass windows and lamps, glass mosaics, blown glass, ceramics, jewelery, enamels and metalwork.

Tiffany was the son of Charles Lewis Tiffany, founder of Tiffany and Company; and Harriet Olivia Avery Young. He attended school at Pennsylvania Military Academy in Chester, Pennsylvania, and Eagleswood Military Academy in Perth Amboy, New Jersey. His first artistic training was as a painter, studying under George Inness and Samuel Colman in New York City and Léon Bailly in Paris.

Tiffany started out as a painter, but became interested in glassmaking from about 1875 and worked at several glasshouses in Brooklyn between then and 1878. In 1879, he joined with Candace Wheeler, Samuel Colman and Lockwood de Forest to form Louis Comfort Tiffany and Associated American Artists. Tiffany's leadership and talent, as well as his father's money and connections, led this business to thrive.