Heathcote Valley is a suburb of Christchurch, New Zealand, dominated by the approaches to the Lyttelton Tunnel, a major arterial pass through the Port Hills that is part of State Highway 74. The suburb is nestled at the foot of the steep volcanic crags that form the northern edge of the hills, some eight kilometres southeast of the city centre. The Lytelton Rail Tunnel also passes close to the suburb.

Despite its name, Heathcote Valley is situated some two kilometres south of the Heathcote River, which does not flow through the suburb but rather flows east across a wide plain.