Yes, you can use coupons with SNAP (Supplemental Nutrition Assistance Program) benefits (previously called Food Stamps).
It is worth noting that some stores may charge you tax on the savings you received from your coupons. For example, let's say your town has a 10% tax and you used $8 worth of coupons, you could end up paying $0.80 cash (the tax on the savings is something you would pay regardless if you use SNAP benefits or not). However, this is something that can vary, by town or store (even same store, different town). So just be aware of this when redeeming coupons with SNAP.