Mount Markham has recently installed a new phone system.  Please make a note that our new Phone Numbers are as follows: 

Main Phone: 315-822-2800     Elementary School: 822-2840  
Business Office: 822-2823 High School: 822-2900
CSE Dept: 822-2827 Middle School: 822-2870
District Office: 822-2824 Transportation: 822-2930