The newest Associate justice is Neil Gorsuch, who became the 113th person to serve on the Court in April, 2017 and filled the vacancy created February 13,2016 by the death of Associate Justice Antonin Scalia.
The newest Associate justice is Elena Kagan, who became the 112th person to serve on the Court in August, 2010. One seat on the Court has been vacant since the February 13,2016 death of Associate Justice Antonin Scalia.