Colletes halophilus is classified as "Near Threatened" by the International Union for Conservation of Nature and European Commission and is listed as nationally notable in Great Britain and is on the National Red List in Germany. It has a small overall population made up of dispersed and isolated sub-populations which are threatened by habitat destruction, coastal management, and urban and infrastructure development of its habitat, nesting sites, and host plants. It may also be threatened by rising sea levels induced by climate change. It does occur in a number of protected areas.
