E series may refer to:
- BMC E-series engine, a series of automobile engines
- Electronic E series of preferred numbers, a series of preferred values for electronic components such as resistors, capacitors, inductors, zener diodes
- Entwicklung series, a late World War II German standardised tank series
- Ford E series (Econoline/Club Wagon), a series of vans
- Honda E engine, a series of automobile engines
- Honda E series, a collection of humanoid robots
- HP E series, a series of digital cameras
- Intel Xeon E series, a line of server-class CPUs.
- Nokia Eseries, Nokia business-oriented smartphones
- QI (E series), the fifth series of the TV quiz show QI
- Robot E-Series, a fictional line of robots created by Dr. Ivo "Eggman" Robotnik in the Sonic the Hedgehog series of video games.
- Embraer E-Jet Family