Is there still a US army camp sw of Seoul and s of 38th parallel in Korea?

Yes, there are still U.S. military installations south of Seoul and south of the 38th parallel in South Korea. The U.S. maintains a significant military presence in the country as part of its defense commitments, particularly in the face of tensions on the Korean Peninsula. Camps such as Camp Humphreys, located south of Seoul, are among the largest U.S. bases in the region.