Automotive Companies in the United States: 2026 Sourcing Guide + Data

The automotive sector in the United States

OneFirmIntel lists 6,914 automotive companies in the United States, all currently in the Established (two star) tier of our register, reflecting a dataset focused on firms with a confirmed trading history. These range from vehicle assemblers to the dense tiered supplier network of parts makers, components specialists, and aftermarket firms that underpins American auto manufacturing. For a buyer or supplier mapping the US base, this is a vetted starting universe rather than a long tail of new microentities.

Auto parts manufacturing alone employed roughly 553,300 people in 2024, even after decades of consolidation, so the supplier ecosystem behind the count is deep. The sector is also unusually policy sensitive right now, which changes how you should read any sourcing decision.

Trade context: volumes, deals, and recent moves

US light vehicle sales grew about 2.3 percent in 2024, with Americans buying roughly 16 million cars, SUVs, and light trucks. On exports, the EU was the second largest market at about 12.4 billion dollars in 2024 and China the third largest at about 4.93 billion dollars, per trade reporting summarized by Brookings and others.

The defining development is tariffs. On 26 March 2025 the US announced a 25 percent tariff on imported automobiles and certain parts including engines, transmissions, powertrain parts, and electrical components, with steel and aluminium inputs also carrying 25 percent duties. The Center for Automotive Research estimated tariff related costs could rise by nearly 108 billion dollars in 2025. USMCA remains the relief valve: vehicles meeting the 75 percent North American regional value content rule can qualify for preference, and importers can apply the tariff only to non US content if they certify US content. With the 2026 USMCA review approaching, the US International Trade Commission has issued further reporting on the automotive rules of origin. For sourcing, the practical effect is a strong pull toward US and North American suppliers, which is exactly where the Established base in our register sits.

Where US automotive companies cluster

The traditional core runs through the Great Lakes auto belt: Michigan, Ohio, and Indiana anchor OEM assembly and Tier 1 suppliers, with a powerful southern axis through Tennessee, Kentucky, Alabama, and the Carolinas built around foreign owned assembly plants. Useful sub segments to filter separately are vehicle assembly and OEMs, powertrain and drivetrain components, body and interior parts, electrical and electronic systems, and aftermarket and replacement parts. Narrow by sub sector in the United States automotive company directory.

Using the data to source and verify suppliers

The Established focus of this base suits automotive procurement, where supplier stability and quality history are non negotiable. Register data confirms a company exists and its declared activity but not its quality certifications, production capacity, or USMCA content position, so use the directory to build a shortlist and then verify IATF 16949 certification, PPAP readiness, capacity, and US or North American content directly with each supplier, since that content position now drives tariff exposure. Benchmark the US base against other automotive markets through the automotive industry overview.

Cross border and practical notes

US firms carry a federal EIN and register at state level, with no single national company register, so expect a Secretary of State entity number in the home state. For trade, the decisive checks are the correct HTS classification and the USMCA regional value content calculation, because qualifying content determines whether a part or vehicle escapes the 25 percent tariff. Suppliers exporting to the EU should also confirm UNECE and homologation requirements. For a wider view of the national base before drilling into automotive, browse the United States company directory and the United States company statistics page.