Mölder is an Estonian surname, an equivalent to the English Miller.
People with this surname include:
- August Mölder (1914-1982), Estonian-Australian artist who was part of the Six Directions collective
- Jaan Mölder (born 1987), Estonian rally driver
- Janika Mölder (born 1970), Estonian rhythmic gymnast and coach
- Maile Mölder (born 1977), Estonian curler and curling coach
- Raigo Mõlder (born 1982), Estonian rally co-driver
- Tõnis Mölder (born 1989), Estonian politician and government minister