Gmina Dubienka is a rural gmina (administrative district) in Chełm County, Lublin Voivodeship, in eastern Poland, on the border with Ukraine. Its seat is the village of Dubienka, which lies approximately east of Chełm and east of the regional capital Lublin.
The gmina covers an area of , and as of 2006 its total population is 2,749.
The gmina contains part of the protected area called Strzelce Landscape Park.
Villages
Gmina Dubienka contains the villages and settlements of Brzozowiec, Dubienka, Holendry, Janostrów, Jasienica, Józefów, Kajetanówka, Krynica, Lipniki, Mateuszowo, Nowokajetanówka, Radziejów, Rogatka, Siedliszcze, Skryhiczyn, Stanisławówka, Starosiele, Tuchanie, Uchańka, and Zagórnik.
Neighbouring gminas
Gmina Dubienka is bordered by the gminas of Białopole, Dorohusk, Horodło and Żmudź. It also borders Ukraine.