MSNBC (stylized as msnbc) is a cable news (US Cable News) channel based in the United States and available in the US, the UK and Canada. Its name is a combination of "Microsoft" and "NBC".

msnbc.com, a separate company, is the news website for the NBC News family, featuring interactivity and multimedia plus original stories and video which augment the content from NBC News and partners.

Two partnerships with the names MSNBC and msnbc.com were founded in 1996 by Microsoft and General Electrics NBC unit, which is now NBC Universal. Although Microsoft and NBC shared operations of MSNBC cable at its founding, it was announced on December 23, 2005, that NBC Universal would purchase a majority stake in the television network, which left Microsoft with 18%. The two companies remain partners in msnbc.com. MSNBC shares the NBC logo (NBC logos) of a rainbow peacock with its sister channels NBC, CNBC and ShopNBC. MSNBC is available in over 78 million households in the United States; and between June 2008 and May 2009, msnbc.com had the most unique visitors among global news and current events websites.

Many observers of the network say that MSNBC has become politically liberal (Liberalism in the United States) compared with other networks, particularly in its prime-time lineup (primetime).