In 1940, the city of Nederland was officially incorporated. The Golden Triangle is the collective name for the bigger nearby cities of Beaumont, Port Arthur, and Orange. The ports of Port Arthur and Beaumont were equally significant in the 1940s and 1950s as New Orleans, Houston, or Galveston, and Nederland prospered as a result.
Additionally, a sizable number of blue-collar workers were drawn to the area by the refineries. The city has a strong Cajun flavor because southern Louisiana contributed significantly to its development. The local economy suffered and there were small population losses in Nederland during the 1980s oil price fall; but, by the late 1990s and early 2000s, things had recovered.
Nederland is the ending location of the Keystone Pipeline.