|Garden City-New York, New York|
|Slogan||New York Public Television|
|Channels||Digital: 21 (UHF)
Virtual: 21 (PSIP)
21.3 PBS World
|Founded||January 14, 1969|
|Call letters' meaning||Long Island West|
|Sister station(s)||WNET, NJTV|
|Former channel number(s)||Analog:
21 (UHF, 1969-2009)
22 (UHF, 1999-2009)
|Former affiliations||NET (1969-1970)|
|Transmitter power||89.9 kW|
WLIW, channel 21, is a non-commercial educational public television station licensed to Garden City, New York, which serves as a secondary Public Broadcasting Service (PBS) station for the New York City television market. WLIW is owned by the New York City-based WNET.org (formerly the Educational Broadcasting Corporation), and is a sister station to both New York City's primary PBS member station, Newark, New Jersey-licensed WNET (channel 13), and the regional NJTV network.
WLIW began broadcasting on January 14, 1969, originally operated by the Long Island Educational Television Council. It is currently the third-most watched PBS station in the country, behind WNET and KOCE-TV in the Los Angeles area. In February 2003, the Long Island Educational TV Council merged with the Educational Broadcasting Corporation, thus combining WLIW's operations with those of WNET. The Long Island Educational Television Council was retained as WLIW's governing board and fundraising arm.
WLIW promotes itself as a more locally-oriented station than WNET, as evidenced by its on-air moniker of "New York Public Television." However, it is a major producer of national PBS programming in its own right. Among its more prominent shows are the innovative Visions series and many music specials featuring noted American performers like Frank Sinatra, Billy Joel, Neil Sedaka, Ricky Nelson and international stars like Helmut Lotti and Sarah Brightman. Regular hosts of these specials produced for PBS include Laura Savini, Terrel Cass, Mark Simone, David Rubinson and Lisa Jandovitz.
Digital television 
The station's digital channel is multiplexed:
|Channel||Video||Aspect||PSIP Short Name||Programming|
|21.1||480i||4:3||WLIW-SD||Main WLIW Programming / PBS|
Analog-to-digital conversion 
On June 12, 2009, WLIW discontinued regular analog programming on channel 21.  The station returned from channel 22 to channel 21.
Its former identity which debuted in 2005, its color palette and on-air graphics, was designed and conceived by Trollback + Company in 2005. It was the station's first corporate branding initiative since its launch in 1969. In 2009, WLIW unified its branding with its sister WNET, adopting a similar logo, but in a blue color scheme rather than WNET's red, but keeping the WLIW 21 name (it does however, carry over the dotted "i" from the WNET logo).