U.S. Census Bureau Available APIs — Economic Census, Annual Survey of Manufactures, VIUS

The U.S. Census Bureau's API catalog is best read as three programs wearing one name. The Economic Census counts every American establishment every five years - 2002, 2007, 2012, 2017 and 2022 - and reports what each of them does: establishment and firm counts, sales and receipts, annual payroll, employment, capital expenditures, inventories, operating expenses and value added, down to individual counties, with 130 documented variables on its base endpoint alone. The Annual Survey of Manufactures fills the years between census waves for factory activity, publishing national sample estimates for all manufacturing establishments with paid employees across 2- through 6-digit NAICS from 2018 through 2021. And the Vehicle Inventory and Use Survey is the rarest of the three: a 2021 census of the US truck population producing national and state estimates of truck counts and miles broken out by body type, vehicle type, gross vehicle weight rating, trailer configuration and business use.

For anyone selling into or analyzing the auto parts economy, the two anchor industries sit ready to query: NAICS 3363 motor vehicle parts manufacturing and NAICS 4413 automotive parts, accessories and tire retailers, both cut by geography at whatever digit depth your question needs. The figures come from the U.S. Census Bureau. Get a sample of this dataset and see real industry-by-county rows before you build the pipeline yourself.

Each program returns flat tabular rows - a header line followed by one record per geography or characteristic. The shapes below follow the publisher's own documented example patterns:

Economic Census 2022, industry filtered to a single sector, nation

NAICS2022_LABEL                          EMP   NAME       GEO_ID
MOTOR VEHICLE PARTS MANUFACTURING (3363) ...   United States  0100000US

VIUS 2021, primary-characteristic tabulation, nation

NAME          GEO_ID     PRICHAR   PRIVALUE  VCOUNT  VCOUNT_S
United States 0100000US  <char>    <value>   <thousands> <flag>

Annual Survey of Manufactures, 2021, all manufacturing

NAICS2017_LABEL              EMP
MANUFACTURING (31-33)        <employees>

Every row answers one question cleanly: how many establishments, how many people on payroll, how many dollars of sales - or, for VIUS, how many thousand trucks of a given body type and weight class logged how many million miles. Because the response shape holds steady across geographies and industries, a script written against one county panel runs unchanged against the whole country. Request a sample and we will pull the exact NAICS-and-county slice your project needs.

Field definitions below are verified against the publisher's documentation. The dictionary covers the fields that do most of the analytical work across the three programs; the long tail - sector-specific endpoints, additional ASM cost and inventory measures, and the remaining VIUS dimension codes - is kept as additional fields on request and ships with every sample.

Two columns earn special mention. NAICS2022 is the master filter: set it to 3363 and every downstream figure - establishments, payroll, receipts - narrows to motor vehicle parts manufacturing; set it to 44132 and you are reading the retailer rows. And VCOUNT arrives with a companion flag (VCOUNT_S) that grades the estimate's reliability, which matters because VIUS tabulates a sampled population rather than a full register.

Geography - the Economic Census reaches furthest: county level, plus state, region, metropolitan statistical area, offshore areas and the Island Areas. The manufacturing survey publishes national estimates only. The truck survey covers the nation and states, New Hampshire excepted in the published tabulations.

Temporal - five Economic Census waves: 2002, 2007, 2012, 2017 and 2022. Manufacturing estimates run 2018 through 2021, with an earlier time-series covering 2002-2016 kept separately. The truck survey is a snapshot of 2021 - the most recent federal read of its kind.

Granularity - industry-by-geography aggregates at 2- through 6-digit NAICS depth; nothing at establishment or company level, by design. Truck-survey rows are characteristic-by-state tabulations, not microdata, so a row reads "this many thousand trucks of body type X in weight class Y" rather than one line per vehicle. A single industry-by-county extract can run from hundreds of rows to tens of thousands depending on how broad a NAICS net you cast.

API, files, or your warehouse. Daily, weekly, or hourly.

You choose the pipe and the cadence; the records stay identical either way. Teams typically start with flat files to validate a hypothesis about their market, then promote the same fields to a scheduled feed or land them directly alongside their own sales and inventory tables. Because the variable names hold steady across census waves and geographies, a county panel built on the 2022 wave extends backward to 2002 without a rewrite - which is what makes twenty-year trend lines practical rather than aspirational.

Six uses come up again and again, each owned by a different seat at the table:

1. Motor-vehicle retail benchmarking - official five-year establishment counts by county and NAICS digit to size the dealer and parts-store universe against private estimates (Market Researchers & Consultants).
2. Territory sizing before rep coverage plans - county establishment and payroll counts decide where a parts territory justifies headcount, drawn before the first sales call (Sales & Growth Teams).
3. Dealer-network density snapshots per wave - framing share conversations with the official count of who operates in a county, wave after wave (Competitive Intelligence & Product Teams).
4. County-by-year demand panels - establishment and payroll series joined across census waves plus the manufacturing survey as exogenous features for forecasting models (Data Scientists & ML Engineers).
5. Local reporting on dealership economies - citable federal establishment and payroll counts, suppression flags handled honestly rather than papered over (Journalists, Academics & Students).
6. County-to-industry lookups inside products - the stable keyed query shape drops straight into an app's backend for territory pickers and market-size widgets (Developers & Data-Product Builders).

Dig into the market researchers use cases or the data scientists use cases to see where this dataset slots into each workflow.

The questions below cover content and fit - what the programs measure, how deep the history runs, why some cells arrive flagged. Anything about delivery mechanics, cadence, or getting rows into your stack belongs in a conversation: request a sample and we will walk your exact use case.

• Automotive Parts & Equipment industry hub - every dataset in the slice, scored and ranked, with the catalog-wide stats behind the rankings.
• Best automotive parts & equipment datasets - where these Census programs sit among quality-scored neighbors such as BLS dealership employment counts and NHTSA safety recalls.
• NHTSA Vehicle Safety API vs Census Bureau available APIs - real-time defect signal against slow-burn market structure; different jobs, compared honestly.
• U.S. Census Bureau source profile - what else this publisher ships, including the CBP wholesale-trade slice that complements these retail and manufacturing counts.
• BLS QCEW auto dealers data - quarterly employment and wages between census waves, the natural cadence companion to this five-year structure.