Krishna had more than 16,000 wives out of which 8 were chief. They are:-
Rukmini, Jambavati, Satyabhama, Kalindi, Mitravinda, Satya, Bhadra, Lakshmana
Rukmini - Rukmini was in love with Krishna and wanted to marry him. But her elder brother Rukmi was forcibly getting her married to Shishupal. Krishna abduvted her (of course, with her consent). A fierce fight ensued between Rukmi, Shishupal and many other warriors on one hand and Krishna on the other. Krishna defeated all of them, brought Rukmini to his palace and married her.
Jambvati - Satyabhama's father was king Satyajit. He was a devotee of Sun god. Pleased with his devotion, Sun god gave him a jewel called Syamantak. Because of the power of the jewel, Satyajit was always in best of health and his kingdom was very proserous. The jewel was really very beautiful and sparkling.
One day, Krishna borrowed the jewel from Satyajit because he (Krishna) wanted to give the jewel to king Ugrasen. But Satyajit refused. Krishna said nothing.
One day, Satyajit's younger brother Prasenjit wore the jewel and went hunting in a forest. Prasenjit and his horse were killed by a lion. The lion dragged Prasenjit's body to a cave. Jambvan saw the lion. There was a fight between Jambvan and the lion in which the lion was killed. Jambvan gave the jewel to his children as a toy to play with.
Meanwhile, Satyajit was worried when his brother did not come back. He told everybody that Krishna must have killed Prasenjit for the jewel.
Krishna heard of the allegation. He investigated the matter and reached the cave of Jambvan and saw the jewel. A very fierce fight took place between Krishna and Jambvan. The fight continued for 28 days. Finally Krishna won. Jambvan was amazed to find a human who could defeat him. He understood that Krishna was none other than Sri Ram. He was overwhelmed with emotion on seeing his Lord and worshipped him. Krishna explained why he wanted the jewel. Jambvan happily gave the jewel to Krishna and also his daughter Jambvati in marriage to Krishna.
Satyabhama - Krishna took the Syamantak jewel from Jambvan and gave to Satyajit and told him the whole story. Satyajit felt bad that he had made false allegation on Krishna. He apologized to Krishna and got his daughter Satyabhama married to Krishna. He also wanted to give the jewel to Krishna but Krishna said that Satyajit should keep the jewel.
Kalindi - One day, Krishna and Arjun were moving in a forest. There they saw a very beatiful lady at some distance. Arjun went to the lady and inquired about her. The lady introduced herself as Kalindi and said that she prayed everyday to get Krishna as her husband. Arjun went to Krishna and reported the matter to him. Krishna took Kalnidi in his chariot and went to Yudhisthir where he stayed for some days. Then he went to Dwarka and married Kalindi.
Mitravinda - There were two kings Vindya and Anuvindya. They treated Duryodhan as their master. They had a sister named Mitravinda. In her swyamvar, many kings and princes came. Krishna also came. Mitravinda wanted to marry Krishna but her brothers told her not to choose Krishna. Then Krishna took her in his chariot, fought the other kings present there, defeated all of them and took her away. Thus Krishna married Mitravinda.
Satya - There was a king named Naganjit. His daughter was Satya. Naganjit wanted his daughter to marry somebody very brave. He put a condition. There were seven very vicious and sharp-horned bullls. Whoever fought with all the bulls at one time and defeated them was allowed to marry Satya. Lord Krishna heard of this and went to Naganjit's kingdom. Naganjit was happy to see Krishna and he felt that Krishna should marry Satya. But it was not proper to break the condition. Krishna accepted the condition and easily defeated all the seven bulls. Then Satya married Krishna. When Satya and Krishna were going to Dwarka, then on the way, they were stopped by other kings who wanted to marry Satya. Krishna's army fought with those kings. Arjun was also present there. He fought on the side of Krishna. Those kings could not face Arjun's arrows and ran away.
Bhadra - Bhadra was a princess of Kaikeya kingdom. She wanted to marry Krishna. Her brothers requested Krishna to marry her and thus she got married to Krishna.
Lakshmana - In Lakshmana's swyamvar, Krishna defeated other suitors and married Lakshmana.