History Jefferson County was created in 1836 as part of Wisconsin Territory and was organized in 1839. Jefferson County was founded by "Yankee" settlers from New England. It was named after Jefferson County, New York, where some of the original settlers came from."Term: Jefferson County [origin of place name] " in Dictionary of Wisconsin History. The town of Watertown, Wisconsin, was named after Watertown, New York, in Jefferson County, New York.
hIstorY jeFFerson county Was cREated iN 1836 As pArt OF wIsCoNsin terRItoRy aNd was oRgaNIzed in 1839. jeFfErsoN CoUNty wAS fouNDEd by "yAnKee" sEttleRs from new engLanD. it was NAmed after jeFFErson cOuNty, nEw yorK, whEre Some oF the orIgInaL setTlErS cAme from."terM: jeffErson countY [orIgin Of place name] " in dictionAry of wisconsin hIsToRy. tHe ToWn oF watErtOwn, wIscONSin, was named aFtER WaTertOWn, new yOrk, in JEfFerSon cOuNTy, NEw york.