This study investigated the factors leading to e-voting adoption successes and failures. Secondary data on e-voting adoption across the world was used in this study.Results indicate that concerns about accuracy, lack of trust, lack of secrecy of votes, lack of verifiability, secrecy of source codes and lack of support from political parties are among the factors leading to failure in e-voting adoption and it vary from country to country.The findings of this study can help in the determination of the necessary factors for the successful and sustainable adoption of e-voting system.