what is the zip code for harahan la
- Stats and Demographics for the 70123 ZIP Code. ZIP code 70123 is located in southeast Louisiana and covers a slightly less than average land area compared to other ZIP codes in the United States. It also has a slightly higher than average population density. The people living in ZIP code 70123 are primarily white. The number of people in their late 20s to early 40s is extremely large while the number of middle aged adults is extremely large. There are also a large number of single adults and a small number of families.