Udorsky District (; ) is an administrative district (
raion), one of the
twelve in the
Komi Republic,
Russia. It is located in the west of the republic. The area of the district is . Its
administrative center is the
rural locality (a
selo) of Koslan. As of the
2010 Census, the total population of the district was 20,400, with the population of Koslan accounting for 11.2% of that number.