| Petar Lončarević | |
| Birth Date: | 20 November 1907 |
| Birth Place: | Belgrade, Kingdom of Serbia |
| Death Place: | Kranj, SR Slovenia, SFR Yugoslavia |
| Height: | 1.90 m |
| Position: | Centre back |
| Youthyears1: | 1925–1929 |
| Youthclubs1: | Jugoslavija |
| Years1: | 1929–1931 |
| Years2: | 1935–1940 |
| Clubs1: | Jugoslavija |
| Clubs2: | Jedinstvo Belgrade |
| Nationalyears1: | 1930 |
| Nationalteam1: | Kingdom of Yugoslavia |
| Nationalcaps1: | 2 |
| Nationalgoals1: | 0 |
Petar Lončarević (Serbian: Петар Лончаревић; 20 November 1907 – 30 March 1978) was a Serbian footballer who played two matches for the Kingdom of Yugoslavia national team in 1930.[1]
While attending a Yugoslav First League match between Olimpija Ljubljana and Hajduk Split in the spring of 1978, he got into an argument with fans of the Ljubljana team and one of them struck him in the head with a blunt object. He lost consciousness and was hospitalized where he was placed in a coma. After not regaining consciousness, he died seventeen days later at the age of 70.[2]