十七烷是一种有机化合物，一种化学式为C₁₇H₃₆的烷烃。十七烷有24894个同分异构体。

Heptadecane is an organic compound, an alkane hydrocarbon with the chemical formula C₁₇H₃₆. The name may refer to any of 24894 theoretically possible structural isomers, or to a mixture thereof.

The unbranched isomer is normal or n-heptadecane, CH₃(CH₂)₁₅CH₃. In the IUPAC nomenclature, the name of this compound is simply heptadecane, since the other isomers are viewed and named as alkyl-substituted versions of smaller alkanes.