Police fired teargas shells and used batons to restore calm, officials said.
Neelofar Jan, a resident of Prang village, was admitted to SKIMS Hospital in the city where she died, they said.
As the news of her death spread, the locals gathered at the district headquarters and staged a demonstration alleging Jan was poisoned by her in-laws.
The protesters, who were demanding action against the in-laws, clashed with police and indulged in stone-pelting, the officials said.
Police had taken cognisance of the death of the woman and started investigations, the officials said.