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Zia (also spelled Dia', Diya, or Ziya, Arabic: ضياء) is a name of Arabic origin.
- Zia Mohiuddin Dagar (1929–1990), popularly known as Z. M. Dagar, Indian musician
- Dia Abdul Zahra Kadim, Iraqi Shiite leader
- Zia Inayat-Khan, (aka Pir Zia), spiritual leader of the Sufi Order International
- Zia Mahmood, (born 1946), Pakistani contract bridge player
- Diya al-Din al-Maqdisi, Hanbali Islamic scholar
- Zia McCabe, (born 1975), American musician and founding member of The Dandy Warhols
- Zia Mian, Pakistani physicist and nuclear expert
- Zia Mody, Indian legal consultant and businesswoman
- Zia Mohyeddin (born 1933), Pakistani actor
- Zia Ul Shah, citizen of Pakistan held by the United States in Guantanamo
- Ziya Tong, Canadian television host
- Zia Rahman, medical scientist and pharmacologist
- Zia-ur-Rahman or Ziaur Rahman, former President of Bangladesh
- Anastasia de Torby (1892–1977), also known as Lady Zia Wernher, Russian aristocrat.
- Park Ji-a (born 1972), South Korean actress
- Applebay Zia, motor glider
- The Zia people, a tribe in New Mexico, United States
- The Zia people (Papua New Guinea), a tribe in Papua New Guinea
- Zia (brachiopod), a brachiopod genus
- Zia International Airport, Bangladesh, now Shahjalal International Airport
- Zamboanga International Airport, Philippines
- Zia (novel), the sequel to Island of the Blue Dolphins by Scott O'Dell
- Zia, a character in the animated television series The Mysterious Cities of Gold
- A character in The Red Pyramid (novel)
- Zia, a small village on the Greek island of Kos
- Zia, the Italian word for aunt
- Zia is the main character in the independent movie Wristcutters: A Love Story.
- Zia (band)
- Zia (singer), the stage name of South Korean singer Baek Ji Hye.