Dimethylphenethylamine may refer to:

• α,α-Dimethylphenethylamine (phentermine)
• N,α-Dimethylphenethylamine (methamphetamine)
• N,β-Dimethylphenethylamine (phenpromethamine)
• 2,α-Dimethylphenethylamine (ortetamine)
• 3,α-Dimethylphenethylamine (3-methylamphetamine)
• 4,α-Dimethylphenethylamine (4-methylamphetamine)
• N,N-Dimethylphenethylamine
• α,β-Dimethylphenethylamine (2-phenyl-3-aminobutane)