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The boundaries of counties in the state of Michigan have not changed since 1987. However, throughout the 19th century, the state legislature frequently adjusted County boundaries. County creation was intended to fulfill the goal of establishing government over unorganized territory, but a more important goal was encouraging settlement by surveying the land and dividing it into saleable sections.
The creation of counties generally occurred in two stages. First the boundaries of a County were declared and given a name. The County appeared on maps, even though this may have been the entire extent of a County 's tangible existence for several years. During this period, the as yet unorganized County was attached to another already organized County for administrative purposes. The legislature frequently changed the administrative attachment of these unorganized counties. Residents of such an attached County could petition the legislature for organization, which was the granting of full legal recognition to the County .
