By the end of Season 4 are Lee and Dee divorced or what? They said goodbye when Lee moved off of Galtica and I thought they were split but then in subsequent episodes he still wears a wedding ring. I'm so confused on what's going on there.

In Season 4 Lee turns down an offer from his father to get back in a Viper and takes a vacant slot on the Quorum of 12. They have a send off ceremony on Galactica's hangar bay to see him off. Dee gives him a plaque with his rank insignia and pilots wings and he replies "looks like you got the house". Their separated, but friendly.

Thanks. I remeber that and I thought they'd gotten divorced but I guess not. It's still weird that he wears his ring though.

Maybe he's accepted the end of the marriage but isn't ready to move on yet. It's his choice whether or not to wear it. The other explanation is that Jamie Bamber forgot to stop wearing it after they filmed the divorce.