Data on Strepsiptera species in Estonia are presented for the first time. Four species from three families – Elenchus tenuicornis (Kirby, 1815), Halictophagus silwoodensis Waloff, 1981, Halictoxenos tumulorum Perkins, 1918 and Stylops melittae Kirby, 1802 – have been recorded. Collection data and colour photographs for each species are presented and their known distribution and biology briefly discussed. A key to species in Baltic countries and Fennoscandia is provided.

Previously, two species of Zygentoma have been reported as synanthropic in Estonia (Lepisma saccharinum Linnaeus, 1758 and Thermobia domestica (Packard, 1873)). Ctenolepisma longicaudatum Escherich, 1905 is an invasive species that is currently expanding its range in Europe, but had no published records from the northern Baltic Region. Ctenolepisma longicaudatum was first found in Estonia in 2018. It has currently several established populations in public buildings in Tartu and Tallinn, but has not been found in private households, nor in other places in Estonia. A brief overview of its invasion history in northern Europe is given.