JAKARTA, Feb 15 (Reuters) - Indonesia reported an 8.06% annual drop in exports in January to $20.52 billion, led by falls in shipments of some of its key commodities, official data showed on Thursday, a much steeper decline than the 2.7% decline expected in a Reuters poll.

Exports from Southeast Asia's largest economy were impacted by sluggish global trade, the statistics bureau said, affecting exports of coal and some metal commodities.

Exports of palm oil dropped 11.54% in January compared to the same month last year. Indonesia is the world's biggest exporter of the edible oil.

Indonesia posted a $2.01 billion surplus in January, while imports in the month rose 0.36%. (Reporting by Fransiska Nangoy, Stefanno Sulaiman; Editing by Martin Petty)