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

The first written mention of Novosedly is from 1276, when it was acquired by the convent in Dolní Kounice.

In the mid-14th century, the village was annexed to the Drnholec estate and shared its owners and fates.

[2] After World War I and the Treaty of Saint-Germain-en-Laye, the municipality became part of Czechoslovakia and got its Czech name.

Following the Munich Agreement German troops marched into Novosedly in October 1938.