Results showed centre-left and right-wing MEPs profiting at the expense of the far-left and centre-right.

There was no single voting system for all member states; each of them adopted its own method, established by national law.

The United Kingdom used a one-round (first-past-the-post) system of 78 constituencies in England, Wales and Scotland, while in Northern Ireland 3 proportional seats were allocated.

Denmark, France, West Germany, Greece, Luxembourg and the Netherlands used a single national proportional system, although in the case of Denmark Greenland had its own constituency with the allocation of one seat and in the case of West Germany the three seats for the West Berlin area were not directly elected but were chosen by the Berlin House of Representatives, given the particular status of the city.

The People's Party's, the European Democrats, Communists and Liberals all lost seats.