Its seat is the village of Łączna, which lies approximately 17 kilometres (11 mi) south-west of Skarżysko-Kamienna and 18 km (11 mi) north-east of the regional capital Kielce.

The gmina covers an area of 61.65 square kilometres (23.8 sq mi), and as of 2006 its total population was 5,245.

The gmina contains part of the protected area called Suchedniów-Oblęgorek Landscape Park.

Gmina Łączna contains the villages and settlements of Czerwona Górka, Gózd, Jaśle, Jęgrzna, Kamionki, Klonów, Łączna, Osełków, Podłazie, Podzagnańszcze, Stawik, Występa, Zagórze, Zalezianka and Zaskale.

North of Gózd, there is at 50°58′57.6″N 20°44′47.1″E / 50.982667°N 20.746417°E / 50.982667; 20.746417 (Gozd Radio Tower) a 104 metres tall free-standing lattice tower used as radio relay.