Luka Ćelović also known as Luka Ćelović-Trebinjac (Serbian Cyrillic: Лука Ћеловић; 18 October 1854 in Pridvorci, near Trebinje – 15 August 1929 in Belgrade) was a Serbian businessman, merchant and rentier. At the beginning of the 20th century, he was one of the most influential people in Serbia, a patriot and a great benefactor, also a philanthropist of education. He was the first president of the Belgrade Cooperative. In 1902, with Milorad Gođevac, he founded the Serbian Chetnik Organization in Belgrade.