Sighnaghi is an administrative-territorial unit in eastern Georgia, Kakheti region. The municipality borders the municipalities of Gurjaani and Sagarejo to the northwest and west, the municipality of Dedoplistskaro to the southeast and the municipality of Lagodekhi and the Republic of Azerbaijan to the north and northeast. The area is 1251.7 km2. Agricultural fields occupy 93,375 ha, and forest resources amount to 5,500 ha.

Kakheti is a region (mkhare) formed in the 1990s in eastern Georgia from the historical province of Kakheti and the small, mountainous province of Tusheti. Telavi is its administrative center. The region comprises eight administrative districts: Telavi, Gurjaani, Qvareli, Sagarejo, Dedoplistsqaro, Signagi, Lagodekhi and Akhmeta.