III Gymnasium Zagreb

Coordinates45°48′45″N 16°00′27″E / 45.8125°N 16.0075°E / 45.8125; 16.0075

Former names

• III Male Gymnasium (1922)
• PTT Education Center (1978)
• III Gymnasium (1991)

^[1]

School typePublic, Gymnasium

Established1922; 103 years ago (1922)^[1]

III Gymnasium III. gimnazija
Address
Ulica Dragojla Kušlana 52 HR-10000 Zagreb Croatia
Coordinates	45°48′45″N 16°00′27″E / 45.8125°N 16.0075°E / 45.8125; 16.0075
Information
Former names	III Male Gymnasium (1922) PTT Education Center (1978) III Gymnasium (1991) [1]
School type	Public, Gymnasium
Established	1922; 103 years ago (1922)[1]
Secondary years taught	9–12
• Grade 9	156 (2024–25)[2]
Language	Croatian
Website	Official website (in Croatian)
Last updated: June 17, 2025

Third Gymnasium (Croatian: III. gimnazija, Treća gimnazija) is a high school in Zagreb, Croatia.

After the school year 2023/24, 138 graduates of this gymnasium enrolled at an institution of higher learning in Croatia, or 92% of students who took up the nationwide Matura exams. The most common destinations for these students were the University of Zagreb faculties of electrical engineering and computing, economics, civil engineering, law, and science.^[3]