The candidate, identified as Girish Parmar, has been detained, police said.
The incident took place at Derai village of Bayad taluka on Tuesday evening after counting of votes for the district Panchayat, Gram Panchayat and Nagarpalika elections got over.
"Fifteen people received injuries after they dipped their hands in hot oil to prove to the lost candidate of their community that they had voted for him. We have already nabbed the candidate," Sabarkantha Superintendent of Police Chirag Koradiya told PTI.
"We will lodge a complaint against the candidate though none of the people, who received injuries, is coming forward to register the complaint as they all belong to one community," he said.
"This is a superstition followed in the village to convince a candidate of their community that they voted for him," he added.