P Selvakumar, 33, said he had been cursed since the killings, suffering paralysis and a loss of hearing.
The wedding took place at a Hindu temple in Tamil Nadu state. The "bride" wore an orange sari with a flower garland and was fed a bun to celebrate.
Superstitious people in rural India sometimes organise weddings to animals in the hope of warding off curses.
'Tried every cure'
Crowds cheered the newly-weds at the end of the ceremony in Sivaganga district, about 50km (30 miles) east of the city of Madurai.
The "bride", who is called Selvi, was led to the temple in Manamudurai wearing a sari before vows were exchanged in a traditional Hindu ceremony.
A relative of the groom who attended the wedding said he hoped Mr Selvakumar would now be cured.
"Fifteen years back Selvakumar was physically fit. But, once he attacked a pair of dogs and thereafter Kumar could not move his limbs freely," the relative, Ramu, told the BBC.
"He tried every cure for his ailment but could not be rid of his disability.
"On the advice of an astrologer and others, he decided to marry a *CENSORED* to get cured. Then we arranged Selvakumar's marriage with a *CENSORED*."
