San Luis Obispo County's jobless rate was 4.7 percent in August, down from 6 percent in the year-earlier period. It was below July's revised 4.8 percent rate.
The California Employment Development Department releases monthly data on employment and industry rates.
The county's rate last month also was below the unadjusted August unemployment rates of 6.1 percent for California and 5.2 percent for the nation.
Because of seasonal work fluctuations — which can be significant — unemployment data are compared with the same month year over year.
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August’s rate was eighth best among the state's 58 counties. San Mateo County reported the lowest August jobless rate in the state, at 3.3 percent. Imperial County reported the highest, at 23.7 percent.
Last month, 132,900 people were counted as employed in San Luis Obispo County out of a total civilian labor force of 139,500. The labor force includes everyone working and looking for work.
Excluding the self-employed, companies and agencies in the county reported 3,800 more jobs in August than in the same month last year — a 3.4 percent increase.
Gains in the trade, transportation and utilities industries boosted job growth in the county, with 1,200 total jobs added in August — a 5.9 percent increase year over year. The most growth was seen in the transportation, warehousing and utilities sectors, which added 700 jobs.
Gains in the educational and health services industries also led employment in the county in August, with 1,000 jobs added — up 7 percent from the same month last year.
The professional and business services industries lost a net total of 300 jobs in August, down 2.5 percent from August 2014.
Of the largest cities in the county, Atascadero reported the lowest jobless rate last month at 3.9 percent, with 600 out of its 15,000 residents eligible for the workforce counted as unemployed, according to subcounty data from the state Employment Development Department.
The city of San Luis Obispo's jobless rate was 5 percent in August, with 1,300 out of its 25,400 eligible residents counted as unemployed.
Paso Robles reported a rate of 5.3 percent, with 800 of its 15,900 eligible workers unemployed.
Arroyo Grande reported a rate of 4.1 percent, with 400 out of its 9,400 eligible workers unemployed.
Data may not add up because of rounding. All unemployment rates reported are calculated on unrounded data.
Because of a smaller workforce at the city level, subcounty rates are subject to large month-to-month fluctuations.