Tsumagoi is located in the north-western part of Gunma, bordering Karuizawa of Nagano Prefecture, and is part of Joshin'etsu National Park. Cabbages are the village's featured produce. Tsumagoi's kogen (highland) cabbages are a national brand, which are shipped to markets in the greater Tokyo metropolitan area from summer to fall. There is also something other than cabbages that Tsumagoi uses to attract visitors.