2003 blackout may refer to:

• 2003 Italy blackout, a serious power outage that affected all of the Italian Peninsula for 12 hours
• 2003 London blackout, a serious power outage that occurred in parts of southern London and north-west Kent
• Northeast blackout of 2003, a widespread power outage throughout Northeastern & Midwestern US and Ontario

This disambiguation page lists articles associated with the title 2003 blackout.
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