Eidangerfjord or Eidangerfjorden is a fjord in Porsgrunn Municipality in Telemark county, Norway.

The 6-kilometre (3.7 mi) long fjord stretches from the village area of Eidanger south to the Langesundsfjord.

The mouth of the Eidangerfjord is located between the town of Brevik and the island of Sandøya.

[1][2] The shipping harbor for the cement produced by Norcem is located on the Eidangerfjorden at Brevik.

The towns of Stathelle and Brevik are situated at the junction of the Langesundsfjord, Frierfjorden, and Eidangerfjord.