As of July 24, 2009, U.S. federal law requires a minimum wage of at least $7.25 per hour. Just over 5% of all hourly-paid workers (or approximately 1% of the total U.S. population) earn an hourly wage at or below the minimum wage. Washington, D.C. has the highest minimum wage of any district in the U.S. at $14.00 per hour. Washington and Massachusetts have the highest minimum wage of any state in the U.S. at $12.00 per hour as of January 1, 2019; Oregon has the third highest at $11.25 per hour. Then New York (state) and Colorado with $11.10 per hour. The next highest state wage rates are in Arizona, California, and Maine at $11.00 per hour, and then Vermont at $10.78 per hour. In addition to federal and state minimum wage laws, the US also has citywide minimum wage laws ($15.59 in San Francisco).