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Legal Definitions - United States v. Darby
Simple Definition of United States v. Darby
United States v. Darby was a landmark 1941 Supreme Court case that upheld the constitutionality of the Fair Labor Standards Act. The Court ruled that Congress could use its Commerce Clause power to regulate intrastate manufacturing activities if the resulting goods were shipped across state lines. This decision significantly expanded federal authority over economic matters and overturned the prior ruling in *Hammer v. Dagenhart*.
Definition of United States v. Darby
United States v. Darby is a landmark 1941 Supreme Court case that significantly expanded the power of the U.S. Congress to regulate economic activity under the Commerce Clause of the Constitution. The case centered on the Fair Labor Standards Act (FLSA) of 1938, a federal law that established nationwide standards for minimum wage, maximum hours, and child labor.
Before Darby, there was debate about whether Congress could regulate the working conditions of companies whose products were manufactured entirely within one state, even if those products were eventually sold across state lines. The Darby Lumber Company, operating solely in Georgia, challenged the FLSA, arguing that its manufacturing activities were purely "intrastate" (within one state) and therefore beyond Congress's reach. A lower court agreed, citing a previous Supreme Court decision (Hammer v. Dagenhart) that limited federal power over local production.
However, the Supreme Court unanimously reversed this decision in United States v. Darby. The Court ruled that Congress does have the power under the Commerce Clause to regulate intrastate activities, such as manufacturing, if those activities produce goods that are intended for or eventually enter interstate commerce. The Court reasoned that Congress could prevent states from gaining an unfair economic advantage by allowing substandard labor practices, thereby ensuring a level playing field for businesses operating across state lines. This decision effectively overturned Hammer v. Dagenhart and solidified Congress's authority to regulate a wide range of economic activities that affect the national economy, even if they appear local on the surface.
Here are some examples illustrating the principle established in United States v. Darby:
- Local Textile Mill: Imagine a textile mill located entirely within South Carolina. All its employees live and work in the state, and the raw cotton is sourced locally. However, the finished fabric is sold to clothing manufacturers in New York, California, and Texas.
United States v. Darby means that even though the mill's production activities are physically confined to South Carolina, federal laws like the Fair Labor Standards Act (setting minimum wage, overtime pay, and child labor rules) would apply to its operations. This is because the fabric it produces enters the stream of interstate commerce, affecting the national market for textiles and clothing.
- Specialized Component Manufacturer: Consider a small factory in Oregon that produces highly specialized electronic components. This factory sells its entire output to a single assembly plant located just across the border in Washington state. The Washington plant then incorporates these components into complex medical devices that are sold to hospitals and clinics nationwide.
Under the precedent of United States v. Darby, the Oregon factory's labor practices and other operational standards could be regulated by federal law. Even though its direct sales are only to one out-of-state customer, its products are an essential part of a larger manufacturing process that clearly involves interstate commerce. Congress's power to regulate commerce extends to the production of goods that are destined for or become part of a product sold across state lines.
- Regional Food Processor: A company in Iowa processes locally grown corn into various food products, such as corn syrup and cornmeal. All the processing occurs within Iowa, and the company's employees are all Iowa residents. However, the processed corn products are then sold to food and beverage companies throughout the Midwest and beyond.
This scenario demonstrates the reach of federal power affirmed by United States v. Darby. Despite the entirely intrastate nature of the processing operation, the fact that its products are shipped and sold across state lines means that federal regulations, such as those governing food safety, labor standards, or environmental impact, can be applied to the Iowa processor. This ensures that local production activities do not undermine national standards or create unfair competition in the broader interstate market.
Last updated: November 2025 · Part of LSD.Law's Legal Dictionary · Trusted by law students since 2018