Dalseong County (Dalseong-gun) is a gun occupying much of south and western Daegu, South Korea. A largely rural district lying along the Nakdong River, it makes up nearly half of Daegu's total area. It is divided in half by a narrow piece of Dalseo-gu that reaches west to the river.

Like the other local government units in South Korea, Dalseong-gun enjoys a moderate degree of local autonomy. The county magistrate and council are elected by the local citizens, although their authority is sharply curtailed. The seat of government is located in Nongong-eup. The current magistrate is Lee Jong-jin.

Dalseong-gun enters historical records in 757, as Daegu-hyeon, a subsidiary of Suchang-gun (modern-day Suseong-gu). Dalseong-gun became part of Daegu Metropolitan City in 1995, as part of a general reform of local governments.

As the near hinterland of Daegu, Dalseong-gun is known as a center of truck farming and tourism. Landmarks of Dalseong-gun include Biseulsan and the Naengcheon resort area beneath Paljoryeong.

The name Dalseong means "Dal Castle," and comes from the earlier name of Daegu, Dalgubeol.

Dalseong-gun is divided into six eup and three myeon. These are in turn divided into 279 ri and 1470 ban.

• Dasa-eup
• Hyeonpung-eup
• Hwawon-eup
• Nongong-eup
• Okpo-eup
• Yuga-eup
• Gachang-myeon
• Guji-myeon
• Habin-myeon

• Geography of South Korea

• (in English) Official multilingual website
• (in Korean) 2004 Statistical Yearbook

35°46′N 128°26′E / 35.767°N 128.433°E / 35.767; 128.433