Borzya (Russian: Борзя, IPA: [ˈborzʲə]; Buryat: Бооржо, Boorjo; Mongolian: Боорж, Boorj) is a town and the administrative center of Borzinsky District in Zabaykalsky Krai, Russia, located 349 kilometers (217 mi) southeast of Chita, the administrative center of the krai.

Borzya is the sunniest city in Russia, the average annual number of hours of sunshine is 2797 hours, or about 63% of the time the sun is above the horizon, Although there had been human settlement on the present site of the town since the 18th century, the modern town began with the construction of the Trans-Siberian Railway in 1899.

The settlement around the Borzya railway station was officially opened in 1900, named Suvorovsky in honor of Alexander Suvorov.

The Kharanor brown coal open-pit mine is located northwest of the town, providing fuel for power generation.

This route was later bypassed by the current Trans-Siberian, which is entirely on the Russian territory, but the original line passing through Borzya is still used for passenger and freight traffic to and from China.