Estonia numbers 15 main administrative subdivisions. Due to the geographical and demographic size of these subdivisions, they are to be considered counties rather than states (Estonian: pl. maakonnad; sg. - maakond). Here is a list of them:

Counties of Estonia
Harju County (Estonian: Harjumaa)
Hiiu County (Estonian: Hiiumaa)
Ida-Viru County (Estonian: Ida-Virumaa)
Järva County (Estonian: Järvamaa)
Jõgeva County (Estonian: Jõgevamaa)
Lääne County (Estonian: Läänemaa)
Lääne-Viru County (Estonian: Lääne-Virumaa)
Pärnu County (Estonian: Pärnumaa)
Põlva County (Estonian: Põlvamaa)
Rapla County (Estonian: Raplamaa)
Saare County (Estonian: Saaremaa)
Tartu County (Estonian: Tartumaa)
Valga County (Estonian: Valgamaa)
Viljandi County (Estonian: Viljandimaa)
Võru County (Estonian: Võrumaa)