Which states have the least representatives in Congress?

In the 112th Congress, seven states and the District of Columbia each have only one member in the House of Representatives; Rhode Island, which is the smallest state in land mass has two Representatives due to population growth. Every state has two Senators (except the District of Columbia, which isn't a state), regardless of size or population.

1. Alaska..................1 Rep; 2 Senators......3 (total)
2. Delaware..............1 Rep; 2 Senators......3 (total)
3. Montana...............1 Rep; 2 Senators......3 (total)
4. North Dakota........1 Rep; 2 Senators......3 (total)
5. South Dakota........1 Rep; 2 Senators......3 (total)
6. Vermont...............1 Rep; 2 Senators......3 (total)
7. Wyoming..............1 Rep; 2 Senators......3 (total)

The District of Columbia has one non-voting (except on committees) delegate in the House of Representatives and no Senators. They are, however, entitled to three electoral votes.