Scores of residents were also injured when about 40 assailants armed with guns and machetes stormed the villages of Angwan Gata, Chenshyi and Angwan Sankwai, attacking locals in their sleep and torching their homes, said Yakubu Bitiyong, a lawmaker at the Kaduna state parliament.
"We have at least 100 dead bodies from the three villages attacked by the gunmen" overnight Friday-Saturday, he told AFP.
Some of the victims "were shot and burnt in their homes while others were hacked with machetes," Bitiyong said.
Local residents blamed the bloodshed on Muslim Fulani herdsmen, who have been accused of similar raids in the past.
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Chenshyi village was the worst affected with at least 50 people killed, said Adamu Marshall, a spokesman for the Southern Kaduna Peoples' Union, a regional political and cultural body.
"Many people are still in the bush, afraid to return to their burnt homes," he told AFP, confirming a total toll of at least 100 dead.
"The attackers looted food and set fire to the barns during the attacks," he added.
Most of the Fulani-linked violence has been concentrated in the religiously divided centre of the country, where rivalries between mostly Muslim herdsmen and mostly Christian farmers have helped fuel the unrest.