Michael Phelps is never married. He is tall, handsome and also a world record holder so he must have lots of affair. Phelps recently has announced his engagement with Nicole Johnson in February 2015. They first met in 2009 but broke in 2012 for short period. Nicole Johnson is a model and also a winner of Miss California USA 2010. He might make, Nicole Johnson, his spouse soon. According to The Richest, Michael Phelps net worth is $55 million dollars. He founded Michael Phelps Foundation and used his bonus of one million dollar from 2008 Olympics to set up his foundation. His foundation mainly spotlight on promoting swimming and improves healthier lifestyle.