To be included on the ballot, a candidate must gather 100,000 valid signatures from citizens. It is rarely a problem and does not reflect candidate's real strength (for example, Kornel Morawiecki, the last placer in 2010, got 21,596 votes, well below 100,000 registration requirement).
The registration process is yet to commence. So far, six individuals officially declares:Waldemar Deska
Very little is known about this Deska fellow and this "Libertarian Party". One thing is sure: his last name literally stands for a "plank".Andrzej Duda
42 years old. Member of the European Parliament (2014-).Janusz Korwin-Mikke
72 years old. Member of the European Parliament (2014-) and a troll.Marian Kowalski
50 years old. Candidate of the far-right National Movement.Magdalena Ogórek
35 years old. Historian, TV personality and formerly an occasional soap actress with considerable career of a party activism. Her name literally stands for a "cucumber".Janusz Palikot
50 years old. Leader of the waning party.
Three more are yet to officially declare, but already unofficially running.Anna Grodzka
60 years old. Member of Sejm (2011-). Originally elected from Palikot Movement, she defected to the Green Party in 2014 and is now a fellow member of yours truly Warsaw caucus. Grodzka is the first openly transgender Member of Parliament in Poland.Adam Jarubas
45 years old. Marshal of the Świętokrzyskie Voivodeship (2006-; gubernatorial equivalent in Poland). PSL vice-chairman.Bronisław Komorowski
62 years old. Incumbent President since 2010. Elected from PO. It is customary for Presidents to suspend their party membership while in office.
I'll provide more detailed profiles later.