We describe herein three new species of scorpions from the Dominican Republic, in the Greater Antillean Island of Hispaniola: Microtityus minimus sp. n. (probably the smallest scorpion in the world from the southernmost foothills of the Cordillera Central Mountains), Tityus kindli sp. n. (from the high peaks of eastern Cordillera Central Mountains), and Cazierius neibae sp. n. (from the southern slope of the Sierra de Neiba Mountains). Additional information is given on their taxonomy, distribution, ecology, and reproductive biology, fully complemented with color photos of live and preserved specimens, as well as their habitat. Figure 20 shows the smallest scorpion female (total length 11.4 mm) photographed with the newborn.