The 2004–05 Omani League was the 29th edition of the top football league in Oman. It began on 23 September 2004 and finished on 19 May 2005. Al-Nasr S.C.S.C. were the defending champions, having won the previous 2003–04 Omani League season. On Thursday, 19 May 2005, Dhofar S.C.S.C. played out a 1–1 draw away in their final league match against Al-Nasr S.C.S.C. and emerged as the champions of the 2004–05 Omani League with a total of 46 points.