Obeng is an Ashanti surname. Notable people with the Ashanti surname include:
Curtis Obeng (born 1989), English footballer
Eddie Obeng (born 1959), British educator and writer
Ernest Obeng (born 1956), Ghanaian sprinter
Francis Obeng (born 1986) Ghanaian footballer
Paul Victor Obeng, Ghanaian mechanical engineer and politician
Seth Obeng (born 1945), Ghanaian soldier
William Obeng (born 1983), American football player