 same-sex married couples in Maryland in 2012 when the state, or the year before the state made it legal, I should say. That number grew to more than 10,000 when the Supreme Court ruled that marriage was a fundamental right that could not be denied to same-sex couples in 2015. Maryland Matters reports that the number of married same-sex couples is now over 16,000 in the state, up around 70% of all same-sex couples in the state.