Lajos is a Hungarian masculine given name, it is a cognate of the English Louis and may refer to:
Hungarian monarchs:
Lajos I, 1326-1382 (ruled 1342-1382)
Lajos II, 1506-1526 (ruled 1516-1526)
In Hungarian politics:
Lajos Aulich, second Minister of War of Hungary
Lajos Batthyány, first Prime Minister of Hungary
Lajos Dinnyés, Prime Minister of Hungary from 1947 to 1948
Lajos Kossuth, Hungarian lawyer, politician and Regent of Hungary
In football:
Lajos Baróti, coach of the Hungary national football team
Lajos Czeizler, Hungarian football coach
Lajos Détári, retired Hungarian football player
Lajos Sătmăreanu, former Romanian football player
Lajos Tichy, Hungarian footballer
In art:
Lajos Csordák, Hungarian/Slovak painter
Lajos Markos, Hungarian American painter
Lajos Koltai, Hungarian cinematographer and film director
In Hungarian literature:
Lajos Bíró, Hungarian novelist, playwright, and screenwriter
Lajos Egri, author of The Art of Dramatic Writing
Lajos Hevesi, Jewish Hungarian journalist and author
In chess:
Lajos Portisch, Hungarian chess player
Lajos Steiner, Hungarian chess player
In other fields:
Lajos Bárdos, Hungarian composer and professor of music at the Franz Liszt Academy of Music
Lajos Pósa, Hungarian mathematician
Lajos Werkner, Hungarian 2x Olympic champion saber fencer
Zoltán Lajos Bay, Hungarian physicist