Location of Kyongju

Gyeongju has a small but growing population of non-Koreans. In 2007, there were 4,671 foreigners living in Gyeongju. This number corresponds to 1.73% of the total population, more than double the figure from 2003. The growth was largely in immigrants from other Asian countries, many of whom are employed in the automotive parts industry. Countries of origin whose numbers have risen include the Philippines, China, Taiwan, Indonesia, and Vietnam. The number of residents from Japan, the United States, and Canada fell significantly in the 2003–2007 period.

When the Silla kingdom reached the peak of its development, Gyeongju was estimated to have a million residents, four times the city's population in 2008. In recent years, Gyeongju has followed the same trends that have affected the rest of South Korea. Like the country as a whole, Gyeongju has seen its population age and the size of families shrink. For instance, the mean household size is 2.8 people. Because this has fallen in recent years, there are more households in the city as of 2008 (105,009) than there were in 2003, even though the population has fallen.