Tan Sri Dato' Seri Haji Abu Hassan bin Omar (Jawi: أبو حسن بن عمر; 15 September 1940 – 8 September 2018) was a Malaysian politician from United Malays National Organisation (UMNO), a major component party of Barisan Nasional (BN) coalition.
[3] Abu Hassan started his political career when he contested and won the Kuala Selangor parliamentary seat in the 1978 general election on 8 July 1978.
[3] There was controversy over the RM5 million expenditure to renovate the official residence of the Menteri Besar at Bukit Megawati, Shah Alam for Abu Hassan during his tenure.
[8][9] In 2000, a poison pen letter started circulating about an alleged sex scandal and ill-concealed relationship between Abu Hassan with his wife's sister.
[10] On 10 August 2000, Abu Hassan abruptly announced his resignation as Menteri Besar of Selangor citing health and family reasons but did not elaborate on other existing controversies and crisis bothering him.