Domestic electricity prices in the EU rose by 2.4% on average between the second half of 2014 and the second half of 2015.
Power prices reached €21.1 (£16) per 100kWh, new figures from Eurostat revealed.
It added the highest increase in household electricity prices during the same period was registered in Latvia (26.8%) and Belgium (15.1%).
Household power prices in the second half of 2015 ranged from below €10 (£7.6) per 100kWh in Bulgaria to more than €30 per 100kWh in Denmark.
The biggest decrease was in Cyprus (22%) followed by Lithuania and Ireland with reductions of 5.8% and 3.2% respectively.
The UK’s electricity prices fell by 1.4%, Eurostat added.
Overall, since 2008 prices in the EU have increased by 33%.
However gas prices fell by 1.7% during the same period to €7.1 (£5.3) per kWh, Eurostat stated.
They ranged from €3 (£2.2) per 100kWh in both Romania and Hungary to almost €12 (£9.1) per 100kWh in Sweden in the second half of 2015.
Since 2008, gas prices in the EU have risen by 14%.