The English Football League One (often referred to as League One for short or Sky Bet League One for sponsorship purposes, and known as the Football League One from 2004 until 2016) is the second-highest division of the English Football League and the third tier overall in the entire English football league system.
League One debuted for the 2004–05 season. It was previously known briefly as the Football League Second Division and for much longer, before the advent of the Premier League, as the Football League Third Division.
At present, Fleetwood Town hold the longest tenure in League One, last being out of the division in 2013-14 season when they were promoted from League Two. There are currently seven former Premier League clubs competing in League One, namely Barnsley (1997–98), Bolton Wanderers (1995–96, 1997–98 and 2001–12), Charlton Athletic (1998–99 and 2000–07), Derby County (1996–2002 and 2007–08) Ipswich Town (1992–95 and 2000–02), Portsmouth (2003–10), and Sheffield Wednesday (1992–2000).
This page also has a version in other languages : Лига 1 Английской футбольной лиги (russian)