Joblessness in April was lower than a year ago in all of Washington state’s 39 counties, according to Employment Security Department data released Tuesday.

King County’s unemployment rate fell to 4.3 percent last month from 5.2 percent in March and 4.7 percent a year ago. Pierce County’s rate was 6.5 percent in April, down from 7.7 percent in March and 8.0 percent a year ago.

In Snohomish County, joblessness dropped more than a full percentage point over the month to 4.9 percent, down from 6.0 percent in March. That was below its year-ago rate of 5.2 percent.

The county unemployment data are not seasonally adjusted for month-to-month fluctuations and are based on a household survey.

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As previously reported, the statewide seasonally adjusted unemployment rate declined to 6.1 percent last month from 6.3 percent in March.

Amy Martinez: 206-464-2923 or On Twitter: @amyemartinez