RCW 70.48.400: Sentences to be served in state institutions—When—Sentences that may be served in jail—Financial responsibility of city or county.

Persons sentenced to felony terms or a combination of terms of more than three hundred sixty-five days of incarceration shall be committed to state institutions under the authority of the department of corrections. Persons serving sentences of three hundred sixty-five consecutive days or less may be sentenced to a jail as defined in RCW 70.48.020. All persons convicted of felonies or misdemeanors and sentenced to jail shall be the financial responsibility of the city or county.