Grid River may refer to:

• Grid River (Luncani), Romania
• Grid River (Părău), Romania

• Caulk cartridge
• Caulker, Charles
• Caulker family of Sierra Leone
• Caulker, Stephen
• Caulker, Steven
• Caulker, Thomas
• Caulking
• Caulkins, Jonathan
• Caulks Creek
• Caulobacter ethensis
• Caulobacter ethensis-2.0
• Caulobacter phage holin family
• Caulocarpus
• Cauloecista chretienella
• Cauloecista halfella
• Caulonemata
• Caulophacus
• Caulophacus (Caulophacus) elegans
• Caulophacus elegans
• Caulophilus
• Caulophilus dubius
• Caulophilus oryzae
• Caulophryne bacescui
• Caulophryne jordani
• Caulophryne pelagica