ZA or Za may refer to:
Zachary David Alexander Efron (; born October 18, 1987) is an American actor. He began acting professionally in the early 2000s, and rose to prominence in the late 2000s for his leading role as Troy Bolton in the High School Musical franchise (2006–2008).
Zagreb ( ZAH-greb, Croatian pronunciation: [zǎːɡreb] (listen)) is the capital and the largest city of Croatia.
Zachary Taylor (November 24, 1784 – July 9, 1850) was the 12th president of the United States, serving from March 1849 until his death in July 1850. Taylor previously was a career officer in the United States Army, rose to the rank of major general and became a national hero as a result of his victories in the Mexican–American War.
Zambia (), officially the Republic of Zambia, is a landlocked country in south-central Africa (although some sources consider it part of East Africa).
Matthew Brett Cardona (born May 14, 1985) is an American professional wrestler. He is currently signed to WWE, where he performs on the Raw brand under the ring name Zack Ryder where he is one-half of the Raw Tag Team Champions with Curt Hawkins in their second reign.
Zanzibar (; Swahili: Zanzibar; Arabic: زنجبار, translit. Zanjibār) is a semi-autonomous region of Tanzania.
Zain Javadd "Zayn" Malik (; born 12 January 1993), known mononymously as Zayn, is an English singer and songwriter.