Liquid-crystalline supramolecular networks have been obtained by self-assembly through the formation of hydrogen bonds. Hydrogen-bonded networks built from 4, 4'-bipyridine and polyacrylates containing a side-chain benzoic acid show smectic A phases. The complexation of poly(acrylic acid) and bis(imidazolyl) mesogenic compounds also leads to mesomorphic networks. Self-assembly of multifunctional small molecules having benzoic acids and pyridyl moieties affords H-bonded networks which exhibit nematic and smectic phases. Liquid-crystalline polymer alloys have been prepared from a thermotropic polyester containing a lateral pyridyl group and poly(4-vinylphenol). The interaction through H bonds between these polymers results in the formation of the miscible blends that show nematic phases. These networks exhibit thermoreversible phase transitions due to the dynamic nature of H bond.