ISQ may refer to:
ICMP source quench, a type of messages in Internet Control Message Protocol (ICMP)
Implant stability quotient
Independent Schools Queensland, an association with which Brisbane Grammar School is affiliated
Industrial Skills Qualification, post-secondary vocational qualification in Brunei
International School of Qingdao, part of the Qingdao MTI International School
International Studies Quarterly, a political science journal
International System of Quantities
IATA/FAA code of Schoolcraft County Airport, an airport in Michigan's Upper Peninsula
