Puerto Rico has acknowledged that Hurricane Maria killed 1 427 people in the US territory, not 64 as it has previously reported.
Maria hit the island in September last year and it has struggled to repair its infrastructure and power grid.
The latest figure was in a draft report for US Congress, requesting US$139 billion in recovery funds.
The government has faced criticism for underreporting the number of those killed in the wake of 2017 storm.
The Caribbean island is home to 3.4 million US citizens.