Chief Justice Mary Mullarkey's long tenure on the state supreme court ended Tuesday.
Mullarkey, who announced her retirement in June, had been a justice since 1987 and chief justice since 1998.
The 66-year old veteran jurist did not offer any public statements about her departure on Tuesday.
Gov. Bill Ritter appointed Monica Marquez, a deputy attorney general, to replace Mullarkey.
Marquez will be sworn in Dec. 10.
Justice Michael Bender has been selected by his colleagues on the high court to be the next chief justice.