The Lehigh Valley Silk Mills were a collection of mills located in the Lehigh Valley region of eastern Pennsylvania in the 19th and 20th centuries. The industry began in 1881 and thrived throughout the Industrial Revolution. The Lehigh Valley Silk Mills also refers to a specific company that owned the Lipps & Sutton Silk Mill and Warren Mill. The first silk mill in the Lehigh Valley opened in 1881 and was followed by the opening of many others. By 1900, there were twenty-three silk establishments in the Lehigh Valley, making Pennsylvania the second largest producer of silk in the world.