Allegan, a W. S. W. county of Michigan, on Lake Michigan; area, 840 sq. m.; pop. in 1870, 32,105. The Kalamazoo river (navigable by small steamboats) intersects it, and it is drained by the Black and Babbit rivers. The soil is a deep black alluvium on the river margins, and in some other parts sand and clay predominate; the surface is undulating and mostly covered with forests. In the S. W. part is a, quarry of.

good limestone. Several lines of railroad traverse the county. The productions in 1870 were 338,243 bushels of wheat, 376,974 of corn, 205,219 of oats, 20,973 of barley, 267,795 of potatoes, 129,223 lbs. of wool, 476,065 of butter, 127,336 of maple sugar, and 27,453 tons of hay. There were 1(57 school houses. The capital, Allegan, is built on both sides of Kalamazoo river, 145 m. W. by N. of Detroit, and has a considerable trade in lumber.