Beomseo (Korean: 범서읍) is an eup of Ulju County, Ulsan, South Korea.

It is located to the east of Muhak Mountain, at an average elevation of 133 meters above the sea level.

[1] As of the year 2023, it had a total population of 68,051.

[2] As of February 2023, Beomseo consists of 10 villages, called ri.

They are:[3]