Valga is a town in southern Estonia and the capital of Valga County and Valga Parish. Until their separation in 1920, Valga and the town of Valka in northern Latvia were one town. They are now twin-towns. The area of Valga is 16.5 square kilometres and that of Valka is 14.2 km2 (5.5 sq mi). Their populations are respectively 12,261 and 6,164. On 21 December 2007 all border-crossing points were removed and roads and fences opened between the two countries with both countries joining the Schengen Agreement.

Valga County is a first-level administrative unit and one of 15 counties of Estonia. It comprises the former area of Valga District. The present-day county was created on 1 January 1990. The capital and largest town of Valga County is Valga, followed by Tõrva and Otepää. It is situated in the southern part of the country and borders Põlva and Võru County to the east, Latvia to the south and west, and Viljandi and Tartu County to the north. 27,650 people live in Valga County as of 2022.