National Agricultural Statistics Service Guide

What It Is

The National Agricultural Statistics Service (NASS) is the official statistical agency of the United States Department of Agriculture (USDA). Operating within the USDA’s Research, Education, and Economics (REE) mission area, NASS provides objective, comprehensive statistics on American agricultural production, economics, and land stewardship. For researchers in agricultural science, resource economics, and agronomy, NASS serves as the federal authority for empirical farm data. Its holdings include recurring probability sample surveys and the quinquennial Census of Agriculture, accessible via the NASS Quick Stats database and REST API.

Who Runs It and What It Covers

NASS is directed by federal statisticians and economists in Washington, D.C., operating across 12 regional field offices serving all 50 states. It coordinates data sharing with federal partners including the USDA Agricultural Research Service (ARS) and the Ag Data Commons repository.

The Quinquennial Census of Agriculture

Conducted every five years for years ending in “2” and “7”, the Census of Agriculture is the only uniform source of agricultural data for every U.S. county. Under Title 7 of the United States Code (7 U.S.C. § 2204g), response is mandatory for any operator receiving a form. A farm is defined as any place producing and selling, or normally selling, $1,000 or more of agricultural products during the census year. The census tracks acreage, livestock inventories, operator demographics, production expenditures, and conservation practices.

Annual Surveys and Reports

NASS issues approximately 500 reports annually across key subject areas:

Crops: Weekly crop progress and condition updates, prospective plantings, grain stocks, and monthly crop production forecasts.
Livestock: Semiannual cattle and hogs inventories, monthly milk production, and poultry hatchery data.
Economics & Prices: Monthly prices received and paid indexes, farm labor wage rates, and land values.
Environmental: Chemical and fertilizer usage surveys for row crops, fruits, and vegetables.

Confidentiality and CIPSEA

Under Title 7 U.S.C. and the Confidential Information Protection and Statistical Efficiency Act (CIPSEA), NASS is prohibited from disclosing individual operational data. All outputs are published in aggregate summaries. Individual records are exempt from Freedom of Information Act (FOIA) disclosure and cannot be used for taxation or regulation.

How to Search and Query NASS Quick Stats

The NASS Quick Stats tool (quickstats.nass.usda.gov) is the online database for historical and current census and survey data dating back to 1866. Use this 8-step workflow to query data:

Open the Portal: Navigate to quickstats.nass.usda.gov to load the cascading selection menus.
Select Sector: Choose from Crops, Animals & Products, Economics, Demographics, or Environmental.
Select Group and Commodity: Refine by commodity group (e.g., Field Crops) and target commodity (e.g., Corn or Soybeans).
Define Category and Data Item: Choose a metric category (such as Area Harvested, Yield, or Price Received) and the specific Data Item descriptor.
Select Domain: Filter by operational domain (e.g., Total or specific economic sales classes).
Specify Geographic Level: Select spatial resolution (National, State, Agricultural Statistics District, County, or ZIP Code) and pick states.
Choose Year and Retrieve: Select target years or All Years. Click Get Data to display tables, export CSV files, or copy the permanent query link.
Query via Web API: For programmatic retrieval, request a free API key at quickstats.nass.usda.gov/api. Query the api_GET endpoint. The API enforces a strict 50,000-row limit per request; broader queries must be broken into state-by-state or annual requests using tools like Python or the R rnassqs package.

Strengths and Limits

Strengths

County-Level Depth: Quinquennial census records cover over 3,000 U.S. counties, enabling detailed spatial and regional analysis.
Statutory Response Rates: The legal mandate of 7 U.S.C. § 2204g minimizes non-response bias across agricultural subsectors.
Longitudinal Continuity: Standardized statistical series span more than a century, supporting long-term economic studies.
Open Data: All reports, datasets, and API endpoints are unrestricted public goods provided free of charge.

Limits

Five-Year Census Intervals: Comprehensive county-level data updates occur only every five years.
Data Suppression: Values in counties with few producers are suppressed to protect privacy, leaving missing observations in granular models.
API Query Ceiling: The 50,000-row request limit requires custom pagination scripts for large national panels.
Domestic Scope: Data coverage is restricted to the 50 states and U.S. territories.

Alternatives: Agricultural Economics and Data Platforms

Researchers requiring analytical modeling, international metrics, or academic literature can pair NASS data with complementary platforms.

Platform	Organization	Primary Scope	Key Outputs	Access
NASS Quick Stats	USDA NASS	Primary U.S. agricultural production and census statistics	Census of Agriculture, crop progress, livestock counts	Web portal, CSV, REST API
USDA ERS	USDA Economic Research Service	Agricultural economic research and policy analysis	Farm income forecasts, ARMS survey analysis, trade outlooks	Reports, chartbooks, data files
AgEcon Search	Univ. of Minnesota & AAEA	Agricultural economics literature repository	Working papers, conference proceedings, journal articles	Open-access web repository
IFPRI Dataverse	IFPRI (CGIAR)	Global food security and development data	Household survey microdata, Social Accounting Matrices, MapSPAM	Open data repository (Dataverse)

USDA ERS (Economic Research Service)

While NASS produces primary statistical counts, the USDA Economic Research Service (ERS) conducts secondary economic modeling and policy research. NASS and ERS co-sponsor the Agricultural Resource Management Survey (ARMS), which tracks farm financial health, production costs, and operator household well-being.

AgEcon Search

Hosted by the University of Minnesota Libraries and sponsored by the Agricultural & Applied Economics Association (AAEA), AgEcon Search provides open access to scholarly papers, conference presentations, and theses in agricultural economics, complementing empirical NASS datasets with academic literature.

International Food Policy Research Institute (IFPRI)

For international research, the International Food Policy Research Institute (IFPRI), part of the CGIAR global partnership, publishes research and open datasets on agricultural growth, rural poverty, and global hunger through the IFPRI Dataverse and CGSpace.

Frequently Asked Questions

What is the difference between NASS and USDA ERS?

NASS collects primary empirical data from farmers and runs the Census of Agriculture. The USDA Economic Research Service (ERS) conducts secondary econometric analysis, policy forecasting, and market outlooks using NASS data and other sources.

Is participation in the USDA Census of Agriculture mandatory?

Yes. Under Title 7 of the United States Code (7 U.S.C. § 2204g), responding to the Census of Agriculture is required by federal law. Individual response records are protected under CIPSEA and cannot be disclosed or used for tax enforcement.

What qualifies as a farm under USDA NASS definitions?

A farm is defined as any establishment that produced and sold, or normally would have produced and sold, $1,000 or more of agricultural products during the census year.

How can researchers access NASS data exceeding the 50,000-row API limit?

Because queries exceeding 50,000 rows return an error, researchers write loop scripts in Python or R (using rnassqs) that segment requests by state or single years before merging the resulting datasets.

Sources

USDA National Agricultural Statistics Service. About NASS: Mission and History. Washington, D.C.: U.S. Department of Agriculture. URL: https://www.nass.usda.gov/About_NASS/. Accessed 2026-11-10.
USDA National Agricultural Statistics Service. Census of Agriculture: Frequently Asked Questions. Washington, D.C.: U.S. Department of Agriculture. URL: https://www.nass.usda.gov/AgCensus/FAQ/2022/. Accessed 2026-11-10.
USDA National Agricultural Statistics Service. Quick Stats Database and API Documentation. Washington, D.C.: U.S. Department of Agriculture. URL: https://quickstats.nass.usda.gov/api. Accessed 2026-11-10.
USDA Economic Research Service. About ERS and ARMS. Washington, D.C.: U.S. Department of Agriculture. URL: https://www.ers.usda.gov/about-ers/. Accessed 2026-11-10.
University of Minnesota Libraries & AAEA. AgEcon Search: Research in Agricultural and Applied Economics. St. Paul, MN. URL: https://ageconsearch.umn.edu/. Accessed 2026-11-10.
International Food Policy Research Institute (IFPRI). IFPRI Datasets and Open Access Dataverse Repository. Washington, D.C.: CGIAR. URL: https://www.ifpri.org/data. Accessed 2026-11-10.