	Introduction

The Fair Labor Standards Act (FLSA), enacted in 1938, is the federal legislation that establishes the general minimum wage that must be paid to all covered workers. The FLSA mandates broad minimum wage coverage. The minimum wage provisions of the FLSA have been amended numerous times since then, typically to expand coverage or raise the wage rate. In 2019, the range of state minimum wage rates is as follows:
29 states and the District of Columbia have enacted minimum wage rates above the federal rate of $7.25 per hour; 2 states have minimum wage rates below the federal rate; 5 states have no state minimum wage requirement; and the remaining 14 states have minimum wage rates equal to the federal rate. In the states with no minimum wage requirements or wages lower than the federal minimum wage, only individuals who are not covered by the FLSA are subject to those lower rates. Mechanisms for Future Adjustments

In any given year, the exact number of states with a minimum wage rate above the federal rate may vary, depending on what mechanism is in place to adjust the state minimum wage. Other states have rates above the federal minimum wage because the state minimum wage rate is indexed to a measure of inflation or is increased in legislatively scheduled increments, and thus the state rate changes even if the federal minimum wage stays unchanged. Of the 29 states and the District of Columbia with minimum wage rates above the federal rate, 9 currently have no scheduled increases beyond 2019, while Arkansas, Massachusetts, and Michigan have legislatively scheduled rate increases after 2019. Thus, of the total of 17 states and the District of Columbia that currently or are scheduled to index minimum wage rates,
seven states—Arizona, Montana, Nevada, New York, Oregon, South Dakota, and Vermont—index the state minimum wage to the national Consumer Price Index for All Urban Consumers (CPI-U); five states—California, Missouri, New Jersey, Ohio, and Washington—index the state minimum wage to the national Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W); two states—Alaska and Colorado—and the District of Columbia use a subnational version of the CPI-U to index the state minimum wage; two states—Florida and Maine—use a regional version of the CPI-W to index the minimum wage; and one state (Minnesota) uses the implicit price deflator for personal consumption expenditures (PCE) to index the minimum wage. Specifically, Figure 3 plots the percentage of the civilian labor force residing in states in which the federal wage serves as the floor. Instead the interaction of federal and state rates has led to the federal minimum wage playing a fluctuating, but generally decreasing, role in establishing a wage floor for the civilian labor force, particularly during periods in which the federal rate is not increased. Federal rate increases in 2007 through 2009 mitigated this reduction, as did earlier changes in the federal rate.
The Fair Labor Standards Act (FLSA), enacted in 1938, is the federal legislation that establishes the general minimum wage that must be paid to all covered workers. While the FLSA mandates broad minimum wage coverage, states have the option of establishing minimum wage rates that are different from those set in it. Under the provisions of the FLSA, an individual is generally covered by the higher of the state or federal minimum wage.
As of 2019, minimum wage rates are above the federal rate of $7.25 per hour in 29 states and the District of Columbia, ranging from $0.25 to $6.75 above the federal rate. Another 14 states have minimum wage rates equal to the federal rate. The remaining 7 states have minimum wage rates below the federal rate or do not have a state minimum wage requirement. In the states with no minimum wage requirements or wages lower than the federal minimum wage, only individuals who are not covered by the FLSA are subject to those lower rates.
In any given year, the exact number of states with a minimum wage rate above the federal rate may vary, depending on the interaction between the federal rate and the mechanisms in place to adjust the state minimum wage. Adjusting minimum wage rates is typically done in one of two ways: (1) legislatively scheduled rate increases that may include one or several increments; (2) a measure of inflation to index the value of the minimum wage to the general change in prices.
Of the 29 states and the District of Columbia with minimum wage rates above the federal rate, 9 currently have no scheduled increases beyond 2019, 3 states have legislatively scheduled rate increases after 2019, and 17 states and the District of Columbia have scheduled increases through a combination of planned increases and current- or future-year indexation of state minimum wage rates to a measure of inflation.
Because the federal and state minimum wage rates change at various times and in various increments, the share of the labor force for which the federal rate is the binding wage floor has changed over time. Since 1981, there have been three series of increases in the federal minimum wage rate—1990-1991, 1996-1997, and 2007-2009. During that same period, there have been numerous changes in state minimum wage policies. As a result of those interactions, the share of the U.S. civilian labor force living in states in which the federal minimum wage is the floor has fluctuated but generally declined, and is about 39% as of 2018.