Sierola thorpei is a species of aculeate wasp belonging to the family Bethylidae.

The species was identified by Karl N. Magnacca in 2019, based on a holotype collected by Stephen E. Thorpe from Glen Innes in Auckland in November 2014 on Lophostemon confertus.

It can be differentiated from other members of Sierola due to its robust build, the short head behind the species' eyes, its infuscate wings and smooth microsculpture.

[2] The species has been found in Canberra, Australia and in Auckland, New Zealand.

[2][1] As the species is known only from modified urban environments, it is likely a species non-native to New Zealand, either originating from Australia, or introduced to both Australia and New Zealand from a third country.