There was no competition held due to World War I.
Celtic were the winners of the Scottish Premier League in 1915.
There was no the Belgian League competition in 1915.
Sparta Rotterdam were the winner of the Eredivisie league in 1915.
Celtic won the Scottish League Cup in 1915.
The Italian League winners of the year 1914 were Genoa CFC.
The Scottish League Cup competition wasn't established until 1946.
The Copa del Rey champion was Athletic Bilbao.
The KIF were the winners of Veikkausliiga in 1915.
Odd Grenland were the winners of the NM Cupen in 1915.
The winners of the Austrian Bundesliga in 1915 were Wiener AC.
The winners of the English FA cup of the year 1915 were Sheffield United.
Everton were the Football League Champions in 1915.