No — not as free, isolated magnetic charges that anyone has confirmed in nature. Everyday magnets always have both a north and a south pole; you cannot break a bar magnet into a lone “monopole.” Particle physics still takes the idea seriously: Dirac’s quantization argument and many grand unified theories predict magnetic monopoles, and laboratories keep searching for them in cosmic rays and at colliders.
The Particle Data Group’s 2026 review states plainly that there have been no confirmed observations of exotic particles with magnetic charge. Experiments continue to tighten flux and mass limits instead of reporting a discovery. Condensed-matter systems can host “monopole-like” quasiparticles, but those are collective excitations inside a material, not standalone elementary monopoles.
Source: Particle Data Group — Magnetic Monopoles (2026 review, PDF)