Sikdar, Sikder or Shikdar is an Indian (mainly Bengali) and Bangladeshi surname. Sikdar means owner of one siki (one quarter) of land. This title was given by the British Government. Sikdars are either Bengali brahmins (erstwhile surname Bhattacharya), who were given the title of Sikdar by britishers. Sikdar means owner of one siki of land (which is 1/4th). They were the zamindars in Bangladesh's Sylhet region.

Notable people with surname Sikdar

• Radhanath Sikdar, Indian mathematician, calculated the height of Peak XV in the Himalaya which was later named Mount Everest.
• Jyotirmoyee Sikdar, an Indian athlete and politician.
• Sutapa Sikdar, Hindi film screenwriter.
• Tapan Sikdar, former Union minister of state in the National Democratic Alliance government.
• Siraj Sikder was a Bangladeshi revolutionary politician.
• Ershad Sikdar, was a Bangladeshi criminal and serial killer, known for committing various crimes such as murder, torture, theft, robbery and others to 7 to 43+ victims.