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Local Area Unemployment Statistics
LAU LAU Program Links

Important Information

Annual Revisions

Each year, historical estimates from the Local Area Unemployment Statistics (LAUS) program are revised to reflect new population controls from the Census Bureau, updated input data, and reestimation. The data for model-based areas also incorporate new seasonal adjustment, and the unadjusted estimates are controlled to new census division and U.S. totals. Substate area data subsequently are revised to incorporate updated inputs, reestimation, and controlling to new statewide totals.

Model-Based Areas

On March 3, 2021, the LAUS program issued 2020 annual-average civilian labor force and unemployment estimates for census regions and divisions; all states and the District of Columbia; the Los Angeles-Long Beach-Glendale, CA Metropolitan Division; the Miami-Miami Beach-Kendall, FL Metropolitan Division; the Chicago-Naperville-Arlington Heights, IL Metropolitan Division; the Detroit-Warren-Dearborn, MI Metropolitan Statistical Area; New York city, NY; the Cleveland-Elyria, OH Metropolitan Statistical Area; and the Seattle-Bellevue-Everett, WA Metropolitan Division, as well as the seven corresponding balance-of-state areas. At the same time, historical data for these areas were replaced back to their series beginnings based on a new generation of time-series models. The revisions to model-based data for states and substate areas in 2019 and 2020 also incorporated updated estimation inputs, while the revisions to data for all model-based areas from April 2010 forward also reflected new population controls from the U.S. Census Bureau. Both not-seasonally-adjusted and smoothed-seasonally-adjusted (SSA) monthly data for these areas were affected.

Statewide data for Puerto Rico (which are not model-based, but rather are tabulated from a household survey similar to the Current Population Survey for the United States) were revised from January 2018 forward. The not-seasonally-adjusted data reflect the incorporation of new population controls, while the SSA data reflect seasonal adjustment and smoothing of the recontrolled not-seasonally-adjusted data.

Substate Areas

On March 19, 2021, data for geographic areas below the state level (other than the model-based areas noted above) were revised from their series beginnings through 2009. These revisions consisted exclusively of controlling to the new model-based totals described above.

On April 16, 2021, revisions were made to data from 2010 through 2020 for geographic areas below the state level (other than the model-based areas noted above), and official annual averages for 2020 were issued. For substate areas, estimation inputs generally were revised back to 2019, while the revisions for 2010–18 largely consisted of controlling to the new model-based totals described above. However, some states had estimation input revisions as far back as January 2010 for their substate areas.

Missing Data

Puerto Rico was not able to conduct normal data collection for its household survey in March or April 2020. Hence, neither statewide nor local area data were published for those two months. Annual-average data for Puerto Rico and its local areas in 2020 cannot be calculated in the absence of the March and April data.


On March 19, 2021, model-based data for Michigan; Detroit-Warren-Dearborn, MI Metropolitan Statistical Area; and Balance of Michigan, state less Detroit-Warren-Dearborn MSA were corrected to reflect outlier effects in both the employment and unemployment inputs for July 1998. Both seasonally-adjusted and not-seasonally-adjusted data for these three areas were affected, and the 1998 annual averages were re-calculated to reflect the corrections to the not-seasonally-adjusted estimates for July.


Last Modified Date: April 16, 2021