Bert Williams (1874–1922) was an American entertainer.
Bert Williams or Bertie Williams may also refer to:
- Bert Williams (Australian footballer) (1873–1955), Australian rules footballer
- Bert Williams (footballer, born 1905) (1905–1974), Welsh professional footballer
- Bert Williams (footballer, born 1920) (1920–2014), English professional footballer
- Bertie Williams (1907–1968), Welsh footballer
- Bertie Williams (Aboriginal activist), co-founder of the Aboriginal Tent Embassy in 1972
- Bertram Williams (sport shooter) (1876–1934), Canadian sport shooter, known as Bert