sentences:  Effectively isolated from the rest of Starke County, these residents asked that their land be annexed to LaPorte County, which was completed on January 28, 1842.Thereafter, the Kankakee River formed the southern boundary of the county.Finally, on January 10, 1850, some twenty sections of land were annexed from St. Joseph County to the east, giving LaPorte County the boundaries that essentially exist to this day.