Tajul Islam (), a Bengali masculine given name of Arabic origin, may also refer to:
Tajul Islam Choudhury (1944–2018), Bangladeshi politician and Opposition Chief Whip Tajul Islam (worker) (1950–1984), Bangladeshi trade unionist AB Tajul Islam (born 1951), Bangladeshi minister and former army captain Mohammad Tajul Islam (born 1973) Bangladeshi lawyer, Chief Prosecutor of the International Crimes Tribunal Mohammad Tajul Islam (born 1955), Bangladeshi Minister of Local Government, Rural Development and Co-operatives Tajul Islam Md. Faruk (died 2019), Bangladeshi politician
See also Taj Islam (name)