neighbouring municipalities are Vantaa, Sipoo and Tuusula.

Kerava covers an area of {{Data Finland municipality/total area Kerava|km2}} of which {{Data Finland municipality/waters area Kerava|km2|abbr=on}} is water. The population density is {{Data Finland municipality/population density Kerava|PD/km2}}. In terms of area, Kerava is the fifth smallest in Finland and the second smallest in the Uusimaa