SZ, Sz, or sz may refer to:
Szczecin (; Polish pronunciation: [ˈʂt͡ʂɛt͡ɕin]; German and Swedish: Stettin, known also by other alternative names) is the capital and largest city of the West Pomeranian Voivodeship in Poland.
Solána Imani Rowe (born November 8, 1990), better known by her stage name SZA ( SIZ-ə), is an American singer and songwriter.
The Sziget Festival (Sziget, pronounced [ˈsiɡɛt], is the Hungarian for "Island") is one of the largest music and cultural festivals in Europe.
Szeged (Hungarian pronunciation: [ˈsɛɡɛd]; see also other alternative names) is the third largest city of Hungary, the largest city and regional centre of the Southern Great Plain and the county seat of Csongrád county.
The city of Székesfehérvár (Hungarian pronunciation: [ˈseːkɛʃfɛheːrvaːr]; see also other alternative names), located in central Hungary, is one of the largest cities in the country.
The Szondi test is a 1935 nonverbal projective personality test developed by Léopold Szondi.
PKP Szybka Kolej Miejska w Trójmieście Sp. z o.o. (Polish pronunciation: [ˈʂɨpka ˈkɔlɛi̯ ˈmjɛi̯ska]; Fast Urban Railway), or SKM, is a railway transportation system in Poland's Tricity area (Gdańsk, Sopot and Gdynia), which also reaches Słupsk, which is 110 km west of Gdynia, and Tczew, which is 31 km south of Gdańsk.