A bill proposed by an Ohio Senator would let the state legally recognize blockchain records and smart contracts.
California Senate Bill 838 would allow businesses to store, issue and transfer shares information on a blockchain.
Now in its second year, the New York State Senate's Internet and Tech Committee has approved two blockchain bills, which now go to the full Senate for a vote.
Tennessee legislators say the state is "ready for the blockchain."
A lawmaker in New York has introduced four bills in an effort to spur research into possible uses for blockchain by the state's government.