With how many countries does Poland share a land border?

Poland shares land borders with seven countries: Germany to the west, the Czech Republic and Slovakia to the south, Ukraine and Belarus to the east, and Lithuania and Russia's Kaliningrad Oblast to the north-east, giving Poland one of the more diverse sets of neighbours in Europe, spanning EU members, a non-EU eastern neighbour pair, and a Russian exclave. The border with Germany is Poland's longest, reflecting centuries of shared and contested history along the Oder-Neisse line established after the Second World War. The option 5 undercounts Poland's neighbours, often because candidates forget the short Kaliningrad border or overlook Lithuania in the north-east. The option 9 overcounts, usually because candidates mistakenly add nearby but non-bordering countries such as Latvia or Hungary, both of which lie close to Poland geographically but do not share a direct frontier with it. Another frequent slip is assuming Poland borders every country in its immediate cultural or historical sphere, including Latvia and Hungary, when physical adjacency actually follows a stricter and shorter list. The revision anchor is: Poland's seven neighbours are Germany, Czech Republic, Slovakia, Ukraine, Belarus, Lithuania and Russia (via Kaliningrad), a set worth memorising alongside the eight neighbours of Austria for comparative border-count questions.