In the 2010 regional elections, she figured in second position on the FN departmental list in the Yvelines, Île-de-France. Marie-Christine Arnautu's FN list, which polled 9.29% in the whole of Île-de-France in the first round, could not take part in the run-off, given that a list must cross a threshold of 10% of the valid votes at a regional level. Because of the process of elimination, she was not elected in the Île-de-France's regional council.