Division I

Division 1 or Division One may refer to:

Association football

Azadegan League, the second-tier professional football league in Iran
Brisbane Premier League Division 1, the second-tier professional football league in Brisbane, Queensland, Australia
Danish 1st Division, of the Danish football league system
Division 1 (Guernsey), the second-tier football league in the Channel Island Guernsey
Division 1 (Swedish football), now Ettan Football, the third-tier football league in Sweden
Football League First Division, the former top division of the English football league system
Hong Kong First Division League, the second-tier football league in Hong Kong
I liga, the second-tier football league in Poland
J1 League, Japan Professional Football League
League of Ireland First Division, the top-flight division of the Irish football league system
Ligue 1, the top-flight division of the football league system in France
The Saudi First Division League, the second-tier football league in Saudi Arabia
Scottish Football League First Division, the now-defunct second-tier football league in Scotland from 1975 to 2013
Thai Division 1 League, the second-tier football league in Thailand
UAE First Division League, the second-tirer football league in United Arab Emirates
Victorian State League Division 1, the second-tier soccer league in Victoria, Australia
Welsh Football League Division One, the former top division of the Welsh football league system

Division 1 (bandy), the third tier of the Swedish bandy league system
Division 1 (Swedish women's football)
Division I (NJCAA)
Division I (US bandy), the top level bandy league in the United States
Division Élite, a French baseball league
First division (baseball), a baseball term
FFHG Division 1, the second tier of French men's ice hockey
Cyprus Basketball Division 1
Hockeyettan, formerly Division 1, the third tier of ice hockey in Sweden, previously the first tier from 1944 to 1975
LFH Division 1, the top tier of French women's team handball
LNH Division 1, the top tier of French men's team handball
NCAA Division I, the highest level of intercollegiate athletics in the U.S.
Women's Flat Track Derby Association Division 1, the highest level of competition in women's flat track roller derby