Gliese 832 b (Gl 832 b or GJ 832 b) is a gas giant exoplanet about 80% the mass of Jupiter, located 16.2 light-years from the Sun in the constellation of Grus, orbiting the red dwarf star Gliese 832.^[3]

The planet takes 9.88 years to revolve around its star at an orbital distance of 3.5 AU;^[2] at the time of discovery, this was the longest-period Jupiter-like planet known orbiting a red dwarf.^[1] The brightness of the faint parent star at that distance corresponds to the brightness of the Sun from 80 AU (or 100 times brighter than a full Moon as seen from Earth).

The planet was discovered at the Anglo-Australian Observatory on September 1, 2008. It would induce an astrometric perturbation on its star of at least 0.95 milliarcseconds and is thus a good candidate for being detected by astrometric observations. Despite its relatively large angular distance, direct imaging is problematic due to the star–planet contrast.^[1] Gliese 832 b was confirmed and its parameters updated by subsequent studies in 2011,^[4] 2014,^[5] and 2022.^[6] In 2023, an astrometric detection of the planet was announced, determining its inclination and revealing a true mass 80% the mass of Jupiter.^[2]