Geirmund is a given name. Notable people with the given name include:
Geirmund Hjørson Heljarskinn (9th century), Icelander Geirmund Brendesæter (born 1970), Norwegian footballer Geirmund Ihle (1934–2016), Norwegian politician Geirmund Simonsen, musician Geirmund the Noisy (died 978), Viking adventurer of the 10th century