Junost (Юность, meaning "youth" in Russian) is a Soviet-era line of electronic musical instruments manufactured at the Murom Radio Plant in the Vladimir Oblast of Russia, the same factory responsible for the Aelita synthesizer. Production ran from the mid-1980s into the early 1990s, and the brand has become a collector's interest among enthusiasts of vintage Eastern Bloc electronics.

The best-known product is the Junost-21, a polyphonic keytar-style analog synthesizer with a 48-note keyboard, shoulder strap, and mod grip. It offers 12 preset timbres with digital indication, three VCO configurations with pre-programmed filter and envelope settings, and a manual mode exposing filter, envelope, and LFO controls. Onboard effects include chorus, unison, vibrato with adjustable depth and delay, and transposition. Another model, the Junost-1122, is an analog combo organ/synthesizer hybrid produced at the same plant.

Junost instruments were often compared by Western collectors to Roland's Juno and Korg's Poly-800 series due to their analog polyphonic voicing, though they use distinct Soviet-designed circuitry. Units circulate primarily through the vintage market on Reverb and eBay, and samples of the Junost-21 have been captured in libraries such as the Pianobook virtual instrument community.

Junost has 2 products cataloged on Equipboard, including Portable & Arranger Keyboards and Synthesizers. Their gear is featured by 1 artist, with the strongest followings in Electronic, Rock, and Pop. Notable users include Arnoldas Lukošius.