The Iowa tribe
are a tribe
of Native Americans
. Together with the Missouri
, the Omaha, the Oto and the Ponca they were once part of the Winnebago. Their estimated population of 1100 (in 1760) dropped to 800 (in 1804), mainly due to smallpox
. In 1824, the Iowa were moved to a reservation
. Today, some of them also live in Oklahoma
. As of 1990, their population is ~1500.