Odd‑parity magnets represent an unconventional magnetic phase that breaks inversion symmetry while preserving time‑reversal symmetry. Here, I show that Fe‑based superconductors hosting coplanar magnetic order realize such a state. By combining low‑energy symmetry analysis with density‑functional theory, I demonstrate that the resulting odd‑parity spin splitting has h-wave character and reaches amplitudes of a few meV placing it within the detection window of spin‑resolved ARPES. This phase is of particular interest because the relevant coplanar magnetic order has recently been observed in P‑doped LaFeAsO, where it coexists with superconductivity [R. Stadel et al., Nat. Commun. 5, 146 (2022)], providing one of the first known examples of coexistence between superconductivity and unconventional magnetism. Our results identify the Fe‑based superconductors as a promising platform for exploring odd‑parity magnetism, both as a standalone phase and in conjunction with unconventional superconductivity.

Status note: Based on work accepted for publication in Physical Review B (DOI: 10.1103/8hq8‑38qs; arXiv:2508.21673).