United States, Mexico, South America, Eurasia, Africa, Atlantic Islands, Australia, introduced in West Indies.
Genus 1, species ca. 70 (5 in the flora).
Kubitzki (2003b) recognized two genera, Frankenia and Hypericopsis, in Frankeniaceae; molecular evidence supports inclusion of Hypericopsis within Frankenia (J. F. Gaskin et al. 2004). Molecular studies have placed Frankeniaceae and Tamaricaceae, which generally have been recognized as related families, in the Caryophyllales (for example, P. Cuénoud et al. 2002).