Forty species of scorpionflies are currently known from Indochina, consisting of 36 Neopanorpa, three Bittacus, and one Bicaubittacus. I describe and illustrate five additional new species from northern and central Vietnam: Neopanorpa angustala n. sp., N. lindsleyi n. sp., N. acetabulifera n. sp., Bittacus tamdaoensis n. sp., and B. bartolozzii n. sp., and discuss their habitats. I provide additional distribution and seasonal data for Indochinese Mecoptera. Moreover, I document the first records of Mecoptera from Cambodia.