Park, also spelled as Pak or Bak is the third-most common surname in Korea, traditionally traced back to 1st century King Hyeokgeose Park and theoretically inclusive of all of his descendants. Park or Bak is usually assumed to come from the Korean noun Bak (박), meaning "gourd". As of the South Korean census of 2015, there were 4,192,074 people with the name in South Korea, or roughly 8.4% of the population.

Silla, was a Korean kingdom that existed between 57 BCE – 935 CE and located on the southern and central parts of the Korean Peninsula. Silla, along with Baekje and Goguryeo, formed the Three Kingdoms of Korea. Silla had the lowest population of approximately 850,000 people, which was significantly smaller than those of Baekje and Goguryeo.