Kammala wannan jumla: An kafa Kossuth County a ranar 15 ga Janairu, 1851. An kira shi bayan Lajos Kossuth, Regent-Shugaba na Hungary wanda ya tafi gudun hijira zuwa Amurka bayan
yakin neman 'yancin kai na Hungary daga daular Habsburg. An faɗaɗa gundumar zuwa arewa a cikin 1857 ta hanyar haɗawa da tsohuwar Bancroft County. Gundumar Crocker wata gundumar ce da aka kirkira daga yanki guda na gundumar Kossuth kamar gundumar Bancroft amma an mayar da ita saboda ba ta fi nisan mil 432 ba.