Cernache de Bonjardim is a parish (freguesia) (municipality of Sertã) in central Portugal. It is often wrongly spelled Sernache de Bonjardim.

The Portuguese hero Nuno Álvares Pereira was born in Cernache de Bonjardim on 24 June 1360.

The population of the parish is of 3 283 inhabitantes (2001), in 72.06 sq km.

The parish chairman (presidente da junta de freguesia) is (2004) Joaquim Filipe Patricio

The parish includes the following villages:

• Brejo da Correia
• Calvaria
• Carvalhos
• Cernache de Bonjardim
• Escudeiros
• Matos
• Mendeira
• Pampilhal
• Pinheiro da Aldeia Velha
• Porto dos Fusos
• Quintã
• Roda
• Sambado
• Várzea de Pedro Mouro