I think it is 5 years, 60k miles, but this is purely based on what I've read on this website.
According to the IC Knowledge base
InsightCentral.net - Honda Insight Warranty Information
"Warranty Information
The Insight has a typical Honda warranty for most of the car, with a much longer (8 year) warranty for many of the new technologies included in the car. Here is a brief summary of the warranty that applies in the United States:
Full warranty coverage: 3 years / 36,000 miles
Conventional portion of powertrain: 5 years / 60,000 miles
Hybrid Battery Pack: 8 years / 80,000 miles
Various computer, control and power modules: 8 years/ 80,000 miles
Catalytic converters: 8 years / 80,000 miles
In Canada, the motor rotor, stator, commutation sensor and wiring are also covered under the 8 year warranty."
Note that the Knowledge Base was posted a long time ago so there could have been changes (for example, the battery pack warranty on some models was extended).
Jim