Sr 2−x Ca x Bi 4 Ti 5 O 18 (x=0, 0.05) powders synthesized by solid state route were uniaxially pressed and sintered at 1225°C for 2h. The obtained dense ceramics exhibited crystallographic anisotropy with a dominant c axis parallel to the uniaxial pressing direction which was quantified in terms of the Lotgering factor. Microstructure anisotropy of both compositions (x=0, 0.05) consisted of plate like grains exhibiting their larger surfaces mostly perpendicular to the uniaxial pressing direction. Dielectric and ferroelectric properties of Sr 2−x Ca x Bi 4 Ti 5 O 18 ceramics were measured under an electric field (E) applied parallel and perpendicularly to uniaxial pressing direction. The obtained dielectric ɛ R (T) and polarization (P–E) curves depended strongly on E direction thus denoting a significant effect from microstructure and crystallographic texture. Sr 2−x Ca x Bi 4 Ti 5 O 18 properties were also significantly affected by Ca content (x): Curie temperature increased from 280°C (x=0) to 310°C (x=0.05) while ɛ R and remnant polarization decreased for x=0.05. The present results are discussed within the framework of the processing and crystal structure–properties relationships of Aurivillius oxides ceramics.