The Menhirs of Lavajo (Portuguese: Menires de Lavajo) are a group of menhirs, located in the civil parish of Alcoutim e Pereiro in the municipality of Alcoutim, Portuguese Algarve.

These structures are territorial marks or define sacred spaces from the Late Neolithic or Chalcolithic period (constructed sometime between 3500 and 2800 B.C.).

[1] A rural group, located on a small 155 metres (509 ft) hilltop, between the Lavajo valley and the ravine of the same name.

The largest (Lavajo I) is 3.14 metres (10.3 ft) high, dark grey phallic-form structure, with its surface stained in brown.

[1] Its carvings combine decoration arranged along a longitudinal groove, with circles and other elements.