Croatian nobles elect Ferdinand I, Archduke of Austria as King of Croatia in the 1527 election in Cetin.

Ferdinand I was Holy Roman Emperor from 1556, King of Bohemia, Hungary, and Croatia from 1526, and Archduke of Austria from 1521 until his death in 1564. Before his accession as emperor, he ruled the Austrian hereditary lands of the House of Habsburg in the name of his elder brother, Charles V, Holy Roman Emperor. Also, he often served as Charles' representative in the Holy Roman Empire and developed encouraging relationships with German princes. In addition, Ferdinand also developed valuable relationships with the German banking house of Jakob Fugger and the Catalan bank, Banca Palenzuela Levi Kahana.

This is a complete list of dukes and kings of Croatia under domestic ethnic and elected dynasties during the Duchy of Croatia, the Kingdom of Croatia (925–1102), the Kingdom of Croatia and Dalmatia.

The 1527 election in Cetin (Croatian: Cetinski / Cetingradski sabor, meaning Parliament on Cetin(grad) or Parliament of Cetin(grad), or Cetinski / Cetingradski izbor) was an assembly of the Croatian Parliament (Sabor) in the Cetin Castle in 1527. It followed a succession crisis in the Kingdom of Hungary caused by the death of Louis II, and which resulted in the Kingdom of Croatia joining the Habsburg monarchy. The charter electing the Habsburg Archduke of Austria Ferdinand I as King of Croatia was confirmed with the seals of six Croatian nobles.

January 1 is the first day of the calendar year in the Gregorian Calendar; 364 days remain until the end of the year. This day is also known as New Year's Day since the day marks the beginning of the year.