Microbembex is a genus of sand wasps in the family Bembicidae. There are more than 30 described species in Microbembex.

Species: These 36 species belong to the genus Microbembex:

• Microbembex albivena R. Bohart, 1993
• Microbembex anilis (Handlirsch, 1893)
• Microbembex argentifrons (Cresson, 1865)
• Microbembex argentina Brèthes, 1913
• Microbembex argyropleura R. Bohart, 1970
• Microbembex aurata J. Parker, 1917
• Microbembex australis R. Bohart, 1989
• Microbembex bidens J. Parker, 1929
• Microbembex californica R. Bohart, 1970
• Microbembex catamarcae Willink, 1989
• Microbembex ciliata (Fabricius, 1804)
• Microbembex coxalis R. Bohart, 1993
• Microbembex cubana R. Bohart, 1976
• Microbembex difformis (Handlirsch, 1893)
• Microbembex elegans Griswold, 1996
• Microbembex equalis J. Parker, 1929
• Microbembex evansi R. Bohart, 1993
• Microbembex gratiosa (F. Smith, 1856)
• Microbembex hirsuta J. Parker, 1917
• Microbembex luteipes R. Bohart, 1993
• Microbembex mendozae R. Bohart, 1989
• Microbembex mondonta
• Microbembex monodonta (Say, 1824)
• Microbembex monstrosa Willink, 1989
• Microbembex mosdonta
• Microbembex nasuta J. Parker, 1929
• Microbembex nigrifrons (Provancher, 1888)
• Microbembex patagonica (Brèthes, 1913)
• Microbembex platytarsis R. Bohart, 1989
• Microbembex pygidialis (Handlirsch, 1893)
• Microbembex rufiventris R. Bohart, 1970
• Microbembex sternalis R. Bohart, 1993
• Microbembex subgratiosa (Strand, 1910)
• Microbembex sulphurea (Spinola, 1851)
• Microbembex tricosa J. Parker, 1929
• Microbembex uruguayensis (Holmberg, 1884)