Mite harvestmen (Cyphophthalmi) are excellent models for studying historical biogeography due to their ancient age and limited dispersal. These tiny arachnids occur throughout New Zealand’s North and South Islands as narrow range endemics. Occurrence data, the recording of a species at a specific location and date, has been collected on New Zealand’s mite harvestmen for a century now. These records are held by many museums, but have never been combined in one place. Having a comprehensive database facilitates the sharing of knowledge through easier access to collection records. Records from fourteen museums were merged into a single spreadsheet, with the format derived from Global Biodiversity Information Facility (GBIF) standards. In total, we compiled data for 1115 collections, comprising over 5000 specimens. Going forward, this database will be used to illuminate biogeographic patterns, such as regional comparisons of species richness across New Zealand.