California has the most freshman members of the House of Representatives, with six new members inducted in the 114th Congress according to The Hill newspaper. Including newly elected senators, Michigan ties with California, with six new members of Congress as of 2015.
California's large congressional delegation means that its large number of freshman House members is not unusual. Of California's 54 congressional districts, 89 percent are represented by incumbents. That is only slightly more than the national incumbent re-election rate. In the 2014 election, 95 percent of all incumbent members of Congress were re-elected, according to the Center for Responsive Politics.