Bałdy [ˈbau̯dɨ] is a village in the administrative district of Gmina Purda, within Olsztyn County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 15 kilometres (9 mi) south-west of Purda and 22 km (14 mi) south of the regional capital Olsztyn.

Before 1772 the area was part of Kingdom of Poland, in 1772–1871 of Prussia, in 1871–1945 of Germany, and again of Poland since 1945.

In the early modern period, until the Partitions of Poland, ceremonies of welcoming newly appointed bishops of Warmia took place in Bałdy. Referring to this tradition, there is the Bishops' Alley (Aleja Biskupów) in the village with memorial stones dedicated to all historical bishops of Warmia.

• Selected memorial stones in Aleja Biskupów:
• 
  Jan Dantyszek
• 
  Marcin Kromer
• 
  Ignacy Krasicki
• 
  Józef Glemp