CFC Thailand communities are present in 6 out of 10 dioceses in Thailand.

Bangkok diocese (CFC Bangkok)

• CFC North Bangkok Chapter (Holy Spirit Parish at AIT, Mary Mother of God Church at Rangsit)
• CFC Central Bangkok Chapter (Holy Redeemer, Mary Help of Christian)
• CFC South-East Bangkok Chapter (St John)
• CFC Nonthaburi Chapter (Nonthaburi)

Surat Thani diocese (CFC South)

• Surat Thani
• Phuket (Laguna and town)
• Krabi
• Tungyai
• Phanom
• Nakorn Si Thammarat
• Chumphon
• Hua hin

Tharae diocese (CFC North-East) 16 parishes

Ubon Rachatani diocese (CFC North-East) 19 parishes

Korat diocese (CFC North-East) 1 parish 

Chiangmai (CFC North)

​Chiangmai 

Other dioceses in Thailand without active CFC communities are Rachaburi, Chantaburi, Udonthani and Nakornsawan