Long may refer to:

Measurement

* Long, characteristic of something of great time, duration * Long, characteristic of something of great length * Longitude (abbreviation: long.), a geographic coordinate * Longa (music), note value in early music mensural notation

Places

Asia

* Long District, Laos * Long District, Phrae, Thailand * Longjiang (disambiguation) or River Long (lit. "dragon river"), one of several rivers in China * Yangtze River or Changjiang (lit. "Long River"), China

Elsewhere

* Long, Somme, France * Long, Washington, United States

People

* Long (surname) * Long (surname 龍) (Chinese surname)

Fictional characters

* Long (Bloody Roar), Long (''Bloody Roar''), in the video game series

Sports

* Long, a Fielding (cricket)#Modifiers, fielding term in cricket * Long, in tennis and similar games, beyond the service line during a serve and beyond the baseline during play

Other uses

* , a U.S. Navy ship name * Long (finance), a position in finance, especially stock markets * Lòng, name for a laneway in Shanghai * Long integer, a computer data type denoted by in many programming languages * Lóng, pinyin transliteration of 龍 or 龙, the Chinese characters for "Chinese dragon"