Curtin was married to Frank Curtin. As a married couple, they also had two children together and they are named Alexa Curtin, Raquel Curtin. Though they were bonded as a married couple for more than two decades, it ended in a divorce in 2013. Besides this married life, there is no any information about her extra affairs and boyfriend.
Before Curtin entered into the acting world, she launched her own bedding and accessories called Lynne Curtin Designs. She is the creator and the solo owner of this line. From 2008, she began appearing in the reality TV series Real Housewives of Orange County and got popular within short period of times. She starred in the 4th and 5th session of this reality series and was fired they had salary problems with her. Her net worth is expected to be high but its actual figure is unknown.