How many states have declared a state of emergency?

As of March 14, all states except Oklahoma and Maine had issued declarations of a state emergency.

As of March 13, 34 states have now issued declarations of a state of emergency.

As states announce confirmed cases of COVID-19 we can expect to see more states with emergency declarations. Almost half of all states (24) have declared a state of emergency due to COVID-19 by March 11, 2020. 

By March 9, Newsweek wrote that 8 states had issued declarations of a state of emergency, all issued by the Governor using Executive power. These states are: New York, Washington, California, Kentucky, Utah, Florida, Maryland and Oregon.

By March 9, 8 states had declared a state of emergency for their state:

1. Saturday, Feb. 29, 2020, Washington Governor Jay Inslee was one of the first U.S. governors to declare a state of emergency,

2. Wednesday, March 4, California Governor Gavin Newsom to declare a state of emergency

3. Sunday, March 1, Florida Governor Ron deSantis declared a public health emergency

4. Thursday, March 5, Maryland Governor Larry Hogan declared a state of emergency 

5. Friday, March 6, Utah Governor Gary Herbert announced a state of emergency

6. Friday, March 6, Kentucky Governor Andy Beshear declared a state of emergency 

7. Saturday, March 7, Florida Governor Ron DeSantis declared a level 2 state of  emergency (which followed a public health emergency declaration on March 1.)

8. Sunday, March 8, Oregon Governor Kate Brown declared a state of emergency

According to By March 11, 24 states had declared a state of emergency for their state:

Wednesday, March 11, Washington, D.C., Mayor Muriel Bowser declared a state of emergency.

Check the interactive map of states with emergency declarations on the National Governor's Association page for COVID-19.