Klentnice (German: Klentnitz) is a municipality and village in Břeclav District in the South Moravian Region of the Czech Republic.

The village is situated on the eastern slope of the hill Stolová hora at 459 m (1,506 ft) above sea level.

The highest point of the municipality is the slope of the hill Obora with an elevation of about 465 m (1,526 ft).

Grave findings of the La Tène culture are documents of an early settlement.

After World War II, the municipality fell back to Czechoslovakia and the German population was expelled.