Gmina Rudka is located in the geographical region of Europe known as the Wysoczyzny Podlasko – Bialoruskie (English: Podlaskie and Belarus Plateau) and the mezoregion known as the Równina Bielska (English: Bielska Plain).

The gmina covers an area of 70.21 square kilometres (27.1 sq mi).

It is located approximately: The region has a continental climate which is characterized by high temperatures during summer and long and frosty winters .

Two rivers pass through the Gmina: Detailed data as of 31 December 2007:[1] Its seat is the village of Rudka.

The following villages are contained within the gmina: Józefin, Karp, Koce Borowe, Niemyje-Jarnąty, Niemyje-Skłody, Niemyje-Ząbki, Nowe Niemyje, Rudka, Stare Niemyje.