The Eurostat statistics agency said unemployment in the 19-nation eurozone dropped to 10.4 percent in December from 10.5 percent in November, its lowest rate since September 2011.
Analysts had expected the December figure to be unchanged at 10.5 percent, taking into account the sharp slowdown in China and the huge turmoil on global financial markets.
By headcount, there were some 16.75 million jobless in the eurozone, down 49,000 from November and 1.5 million less compared with December 2014.
Greece and Spain continued to have the highest jobless rates, at 24.5 percent and 20.8 percent, while economic powerhouse Germany was on 4.5 percent, compared with 10.2 percent in France where the economy continues to struggle.
Eurozone unemployment hit a record 12.2 percent in September 2013 as the damaging eurozone debt crisis peaked out.