Lyman County History
from "Doane Robinson's Encyclopedia of South Dakota"
transcribed by Karen Seeman
Lyman County, created, 1873; organized, 1893; Jones County was cut off in 1916; named for Maj. W. P. Lyman (q. v.); begins at point in main channel of the Missouri River, where southern boundry [sic]of Minnesota, if projected, would intersect that stream; thence west along such line until it intersects 10th guide meridian; thence north along said guide meridian until it intersects the main channel of White River; thence west along the main channel of White River until it intersects the west line of the 5th Principal Meridian survey; thence north along said meridian until it intersects the north township line of township 108 north, range 79 west; thence east along said township line until it intersects the main channel of the Missouri River; thence southeasterly down the main channel or river to place of beginning, except that American Island is not included in Lyman County; Code, 147. County seat, Kennebec; Area, 1,051,520 acres. The county seat was at Oacoma from organization until 1922, when it was voted to Kennebec.