Long noncoding RNAs (lncRNA) are non-protein coding transcripts longer than 200 nucleotides. The field of long noncoding RNA (lncRNA) research has been rapidly advancing in recent years as its large number and important biological functions. Genomic imprinting is an epigenetic phenomenon. The lncRNAs play a critical role in important biological functions by establishing genomic imprinting of target genes. Genomic imprinting has been a great resource for studying transcriptional and post-transcriptional-based gene regulation by lncRNAs. This review will focus on the mechanisms of imprinting in six of the most well-studied imprinted gene clusters: Kcnq1/Cdkn1c, Igf2r/Airn, Prader-Willi (PWS)/Angelman (AS), Snurf/Snrpn, Dlk1-Dio3, H19/Igf2, and overview the functional role of antisense lncRNAs (Kcnq1ot1t1, Airn and Ube3a-ATS), intergenic lncRNAs (H19, IPW and MEG3), and enhancer lncRNAs (IG-DMR eRNAs) to understand the diverse mechanisms being employed by them in cis and (/or) trans to regulate the parent-of-origin-specific expression of target genes. A better understanding of these downstream mechanisms will help to improve our general understanding of the function of ncRNAs throughout the genome.