The Sutla flows through the following municipalities: • in Slovenia:
Rogatec,
Rogaška Slatina,
Podčetrtek,
Bistrica ob Sotli,
Brežice • in Croatia:
Đurmanec,
Hum na Sutli,
Desinić,
Zagorska Sela,
Klanjec,
Kraljevec na Sutli,
Brdovec The hydrological parameters of the Sutla are regularly monitored in Croatia at
Zelenjak. The division of the Sutla/Sotla basin area between Croatia and Slovenia is inconsistent in sources; Croatian sources claim either or , while Slovenian sources claim either or .
Kozje Park (Slovene: ), established in 1981 as Trebče Memorial Park (), is located in Slovenian territory west of the Sotla. It covers of the landscape of the
Kozje Hills (), including
wetlands along the Sotla. It is the habitat of over 120 bird species and of about 950
higher plant species. The earliest known mention of Sutla was in 1028, as
Zontla. The name is pre-Slavic in origin and comes from . The root does not have a known meaning. ==References==