The Mercer Island City Code is current through Ordinance 18-07, passed July 24, 2018.
A full code PDF file current through Ordinance 17-28 is available here. It is a very large file which may take a few minutes to load.
Disclaimer: The City Clerk's Office has the official version of the Mercer Island City Code. Users should contact the City Clerk's Office for ordinances passed subsequent to the ordinance cited above.
City Website: http://www.mercergov.org/
City Telephone: (206) 275-7793