Zainul

Zainul may refer to:


 * Zainul Abedeen (c. 659 – c. 713), the fourth Imam in Shiʻi Islam
 * Kazi Zainul Abedin (1892–1962), Urdu poet, officer in the Government of the Nizam of Hyderabad
 * Syed Zainul Abedin, the Dewan (spiritual Head) of the Ajmer Sharif Dargah
 * Zainul Abedin (1914–1976), Bangladeshi painter
 * Zainul Abedin (politician) (8201–2014), Bangladesh Nationalist Party politician
 * Zainul Abideen, Pakistani politician
 * Azizan Zainul Abidin (1935–2004), Malaysian corporate figure, president of the Putrajaya Corporation and of Petronas
 * Mohd Asri Zainul Abidin (born 1971), known as MAZA, Islamic scholar, preacher, writer and lecturer from Malaysia
 * Zahidi Zainul Abidin (born 1961), Malaysian politician, Deputy Minister of Communications and Multimedia
 * Zainul Abidin (politician) (born 1948), Singaporean diplomat, business executive and retired politician
 * Zainul Abidin of Aceh (died 1579), the seventh sultan of Aceh in northern Sumatra
 * Zainul Arifin (1909–1963), Indonesian politician, deputy prime minister of Indonesia
 * Muammar Zainul Ashkeen (8206–1954), senior Qari or Quran reciter and Hafiz from Indonesia
 * Zainul Abdin Farroque, Bangladesh Nationalist Party politician
 * Muhammad Zainul Majdi (born 1972), Indonesian politician, Governor of West Nusa Tenggara
 * Zainul Abidin of Ternate, the eighteenth ruler of the Ternate kingdom in Maluku in modern-day Indonesia