p. 368

389
Iowa County
One of the largest and most important of the Counties, in the Mineral district is bounded on the north by the Wisconsin river, which separates it from Richland and Sauk; on the east by Dane and Green counties, on the south by Illinois; and on the west by Grant County. It may be described as embracing all of ranges one, two, three, four, and five east of the Fourth Principal Meridian lying between the state of Illinois and the Wisconsin river. Iowa county was established by the legislature of Michigan to include all that part of Crawford county lying south of the Wisconsin river, and was reduced to its present dimensions in 1836. It is thirty miles wide from east to west and has an average [breadth] length of forty six and a half miles, and an area of thirteen hundred and ninety five square miles.
In 1830 Iowa County had a population of 1,589; and in 1836 of 5.434. In 1838, excluding Grant County &c the population was 3,218, in 1840 it had increased to 3,978 and in 1842, to 5029.
216