On the coast there is predominance of big desert extensions, framed by hills and, in many cases, interrupted by oases formed by the rivers that take water all the year round. In these extensive coastal valleys, as Pativilca, Chancay, Rímac, Lurín and Cañete, are based cities and an agriculture of irrigation prospers.

The Andean sector is more rough. In the low floors there are slopes with dense network of thalwegs; in the average and top altitudes they find deep and narrow fluvial "cannons" formed by the rivers Huaura, Screamer, Rímac and Cañete. Of these cannons, one of more acquaintances is that of the Portable stove, to the east of Lima, with mas of thousand meters of altitude, which can be observed in all his magnitude if one travels by road or for train.

The coastal morphology, as on the whole coast, is slightly rough. In the littoral, Huacho's bays, The Callao or Chorrillos are the most important accidents. The insular part of the department is represented by the islands The St Lawrence (the biggest and extensive, whose major height reaches 300 meters approximately), The Fronton, Huaura, Ear, Fishermen, Don Martin, Pachacámac, Bent, Chilca and Asia.