This is a long overdue blogpost with maps of the 2014 European Parliament Elections, which transcribes the info I had posted a few months ago on this Twitter thread.
For the 2019 Elections see this article in the German publications Die Zeit.
Center-right EPP group did best in Hungarian-minority areas ofRomania, Slovakia and German-speaking South Tyrol in Italy.
I does generally well in Hungary, Germany (especially Bavaria), Slovenia and Croatia, Latvia, Poland (especially Silesia) and northern Iberia.
Weak in France and Italy.
Center-left Socialists and Democrats group had a good score in Romania (especially the south and east of the country), in Sweden, Slovakia as well as Bulgaria & southern parts of the Iberian peninsula.
Industrial areas of the UK, western Germany, Wallonia (in Belgium) and Central Italy also high, as well as the Overseas voting areas.
It’s the only group present in all Member States.
The Conservative and Reformist group have a much smaller footprint among the Member states, but high numbers in the UK and Poland, as well as a good showing in Flanders 🇧🇪, Denmark and the Dutch Bible Belt.
Polish minority vote in Lithuania is also a member of the conservatives.
There are some notable areas with a Liberal presence, especially Estonia, Finland and the Benelux countries, and a pattern of regionalist (Spain, Croatia) and minority parties (Turks and Pomaks in Bulgaria, Swedish-speakers in Finland) in this group. But big states missing from ALDE.
The far left United European Left-Nordic Green Left is strong in rural Finland and Sweden, southern Portugal, the Basque country and the Greek-speaking member states. Good presence overseas as well. It is absent in the East due to toxic legacy, with very notable exception of East Germany and Czechia. This group also fares well oversees.
Within Greens-EFA group, the Regionalists are strong in Catalonia, Wales and Scotland. On the other hand, the Greens are strongest in lush French Guyana, some Polynesian islands, the cities of north-west Europe as well as regions with a history of environmental activism (like the Hanoverian Wendland). The group is notably absent in the southern and eastern parts of the union.
The backbone of the populist EFDD group is UKIP (strongest in England and Wales) and the 5 Star Movement in Italy. Further backing in Sweden and the Baltic-speaking states. Only present in 6 countries but highly concentrated in most of those.
The Non-Inscrits were made up of mostly far-right parties (Front National, Lega Nord, DUP, Golden Dawn, Jobbik) who went on to form a group in 2015. The Greek Communist Party, oddly enough, was also part of this non-group.
And finally a reminder that turnout varied a lot by Member State in 2014.
Maps made in QGIS + some Python work + post-production in Inkscape.