[3] The parish is named for Pierre Le Moyne d'Iberville, who founded the French colony of Louisiana.

[4] A few archaeological efforts have been made in the parish, mainly to excavate the Native American burial mounds that have been identified there.

The first expedition, led by Clarence B. Moore, was an attempt at collecting data from a couple of the sites, and it set the groundwork for later projects.

Moore was mainly interested in the skeletal remains of the previous inhabitants, rather than excavating for archaeological items.

Among its religious population in 2020, the Association of Religion Data Archives determined there were 1,700 non-denominational Protestants, and 7,901 Roman Catholics.

Branches include Bayou Pigeon (Unincorporated area), Bayou Sorrel (Unincorporated area), East Iberville (St. Gabriel), Grosse Tete (Grosse Tete), Maringouin (Maringouin), Rosedale (Rosedale), White Castle (White Castle).

[25] The Gillis W. Long Center, located on the outskirts of Carville, LA, is operated by the Louisiana Army National Guard.

This post is home to the 415TH MI (Military Intelligence) Battalion, the 241ST MPAD, and the 61st Troop Command.