Saudagar (Bengali: সওদাগর), also spelt Sawdagor or Sadagar, is a Bengali surname meaning merchant. It may refer to:
Chand Sadagar (c. 200 – c. 300), sea merchant
Sheikh Osman Ali Sadagar (1856–1948), politician, cultivator and educationist
Nur Ahmed Saudagar (1890–1964), politician and lawyer
Abdul Jabbar Saudagar (fl. 1909), merchant and martial artist
Haji Muhammad Dula Mia Saudagar (1910–2000), jeweller and Sufi
Abdul Gani Saudagar (1926–2018), politician
Muhammad Yunus Saudagar (born 1940), economist and civil society leader
Muhammad Ibrahim Saudagar (born 1945), physicist and academic
Shahid Hasan Sawdagor (born 1966), Misha Sawdagor, film actor
Aslam Hossain Saudagar (born 1966), parliamentarian