The Pyatigorsky otdel was a Cossack district (') of the Terek oblast of the Caucasus Viceroyalty of the Russian Empire. The area of the Pyatigorsky otdel makes up part of the North Caucasian Federal District of Russia. The district was eponymously named for its administrative center, Pyatigorsk.
The subcounties (uchastoks) of the Pyatigorsky otdel were as follows:
According to the Russian Empire Census, the Pyatigorsky otdel had a population of 181,481 on , including 93,961 men and 87,520 women. The majority of the population indicated Russian to be their mother tongue, with a significant Ukrainian speaking minority.
According to the 1917 publication of Kavkazskiy kalendar, the Pyatigorsky otdel had a population of 200,486 on , including 103,598 men and 96,888 women, 117,908 of whom were the permanent population, and 82,578 were temporary residents: