SYSTEM all green source census.gov queue 12,841 tables p99 latency 412ms dataflirt.com · scraper/census-gov
RUN · 31 active pipelines · census.gov live

Census data,
at warehouse scale.

We extract ACS, Decennial Census, economic indicators, and geographic boundary data. Delivered as clean JSON, CSV, or Parquet to S3, BigQuery, or Snowflake on your cadence.

Demographics extracted
14.2M /month
API requests
3.8M /day
Geospatial boundaries
84K /run
Active pipelines
31
Uptime
99.98%
Data Dictionary

Every field we extract from census.gov

Structured, schema-consistent data across all major object types — delivered clean, typed, and ready to query.

Complete list of extractable fields for Demographics (ACS) objects from census.gov. All fields typed and schema-versioned.

fips_codestatecountytracttotal_populationmedian_incomemedian_agepoverty_rateeducation_bachelors_pct
demographics_(acs)
● 200 OK
"fips_code": "06037207102",
"state": "California",
"county": "Los Angeles County",
"tract": "2071.02",
"total_population": 4821,
"median_income": 82450.0,
"median_age": 36.4,
"poverty_rate": 12.1,
"education_bachelors_pct": 34.2
# fips_codestatecountytracttotal_populationmedian_income
1
2
3

Complete list of extractable fields for Economic Indicators objects from census.gov. All fields typed and schema-versioned.

survey_idnaics_codeindustry_nametotal_establishmentsannual_payrolltotal_employeesqtr_revenueyear
economic_indicators
● 200 OK
"survey_id": "CBP2021",
"naics_code": "511210",
"industry_name": "Software Publishers",
"total_establishments": 14205,
"annual_payroll": 124500000,
"total_employees": 842100,
"year": 2021
# survey_idnaics_codeindustry_nametotal_establishmentsannual_payrolltotal_employees
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Complete list of extractable fields for Housing objects from census.gov. All fields typed and schema-versioned.

fips_codehousing_unitsoccupied_unitsvacant_unitsmedian_home_valuemedian_renthomeowner_vacancy_raterental_vacancy_rate
housing
● 200 OK
"fips_code": "48201",
"housing_units": 1842910,
"occupied_units": 1698200,
"vacant_units": 144710,
"median_home_value": 245000.0,
"median_rent": 1250.0,
"homeowner_vacancy_rate": 1.4,
"rental_vacancy_rate": 6.8
# fips_codehousing_unitsoccupied_unitsvacant_unitsmedian_home_valuemedian_rent
1
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Complete list of extractable fields for Geographic Boundaries objects from census.gov. All fields typed and schema-versioned.

geoidnamelsadalandawaterintptlatintptlongeometry_geojson
geographic_boundaries
● 200 OK
"geoid": "36061",
"name": "New York County",
"lsad": "06",
"aland": 58684203,
"awater": 28551405,
"intptlat": "+40.7766428",
"intptlon": "-073.9701871",
"geometry_geojson": "{"type": "Polygon", "coordinates": [...]}"
# geoidnamelsadalandawaterintptlat
1
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Complete list of extractable fields for Business Patterns objects from census.gov. All fields typed and schema-versioned.

fips_codenaics_codeest_totalest_1_4_empest_5_9_empest_10_19_empannual_payroll_1000snoise_flag
business_patterns
● 200 OK
"fips_code": "17031",
"naics_code": "722511",
"est_total": 4102,
"est_1_4_emp": 841,
"est_5_9_emp": 1024,
"est_10_19_emp": 1150,
"annual_payroll_1000s": 2410500,
"noise_flag": "G"
# fips_codenaics_codeest_totalest_1_4_empest_5_9_empest_10_19_emp
1
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Capabilities

Everything you need from Census.gov — nothing you don't

Our Census pipeline handles every layer of the platform: API orchestration, FTP bulk downloads, variable mapping, and geographic traversal — delivering clean data directly to your warehouse.

ACS Extraction

Extract American Community Survey 1-year and 5-year estimates across all geographic levels.

Economic Census Data

Pull detailed industry statistics, payroll, and establishment counts by NAICS code.

Geographic Granularity

Traverse data from national level down to state, county, tract, and block group FIPS codes.

API Rate Limit Management

Handle Census API token rotation, rate limiting, and backoff protocols automatically.

Bulk File Parsing

Download, decompress, and parse large FTP text and CSV dumps into normalised warehouse tables.

TIGER/Line Geodata

Extract and transform shapefiles into queryable GeoJSON or WKT formats for spatial analysis.

PUMS Microdata

Process Public Use Microdata Sample files for custom cross-tabulations and statistical modelling.

Cross-Survey Joining

Normalise variables across different census surveys using standard FIPS and NAICS identifiers.

Scheduled Updates

Run continuous pipelines aligned with Census Bureau release schedules to maintain fresh data.

// engagement pipeline

From FIPS list to warehouse record

Brief in. Clean data out.

Define Scope
d 0

Provide target surveys, geographic granularity, and variable lists. We design the extraction schema together.

Pipeline Build
d 2–4

We configure API clients, FTP parsers, variable mapping, and pagination logic for census.gov.

Validation & QA
d 4–6

Schema validation, null-rate checks, FIPS code verification, and sample data review before full launch.

Delivery
ongoing

JSON / CSV / Parquet pushed to your S3 bucket, BigQuery dataset, or Snowflake stage on agreed cadence.

Under the hood

How our Census pipeline handles the hard parts

Working with government data systems requires navigating archaic protocols and complex metadata. Here is how we build resilience.

pipeline-monitor · census.gov · live ● active
// fingerprinting
Identity rotation
TLS fingerprintrandomised
User-agentrotated
IP poolresidential
Challenges blocked0
// pagination
Page coverage
48,291 pages queued running
// observability
Pipeline health
99.9%
uptime
142ms
p99 lat
0.3%
null rate
2
alerts
Complex API Pagination
Automated geographic traversal

The Census API limits response sizes and requires complex nested queries to extract full state or national datasets. We handle the loop logic across all FIPS codes.

Variable Code Mapping
Translating B01001_001E to population

Census variable names require external metadata dictionaries to translate into human-readable columns. We map these automatically during extraction.

FTP Bulk Processing
Parsing massive legacy text files

Historical data often resides in massive, poorly formatted text files on Census FTP servers. We automate the download, parsing, and cleaning.

Geographic Hierarchy
Enforcing relational integrity

Matching tracts to counties to states requires strict adherence to FIPS standards. We enforce geographic relational integrity across all datasets.

Rate Limiting
Concurrency and backoff management

Even with API keys, Census servers throttle aggressive extraction. We manage concurrency and backoff to ensure reliable delivery without connection resets.

Applications

Who uses Census data — and how

Teams across industries use census.gov data to build competitive products and smarter operations.

01
Site Selection & Real Estate

Retailers and developers use tract-level income and population data to evaluate new store locations.

02
Economic Forecasting

Analysts track county business patterns and retail trade surveys to build macroeconomic models.

03
Market Segmentation

Marketing agencies use demographic and housing statistics to define target audience profiles by zip code.

04
Academic & Policy Research

Researchers process PUMS microdata for sociological studies and public policy impact assessments.

05
Healthcare Planning

Providers analyse age distribution and insurance coverage statistics to plan facility expansions.

06
Risk Assessment

Insurers correlate housing age and geographic data with claims models to optimise underwriting.

Why DataFlirt

"The Census Bureau holds the most comprehensive demographic dataset in the US, but extracting it across thousands of FIPS codes requires serious engineering."

Working with census.gov data means navigating archaic FTP servers, complex variable dictionaries, and strict API limits. DataFlirt manages the orchestration, variable mapping, and geographic joins so your analysts can query clean demographic tables directly in your warehouse.

Technical Spec

Census scraper — technical capabilities

Everything supported by our census.gov scraper — rendered SPA elements, auth walls, rate-limit evasion and beyond.

Census API integration
Automated key rotation and pagination
Supported
FTP bulk parsing
Download and parse legacy text dumps
Supported
Variable mapping
Translate B01001_001E to total_population
Supported
Geographic traversal
Loop through all tracts in all counties
Supported
Shapefile to GeoJSON
Convert TIGER/Line spatial data
Supported
PUMS microdata
Process individual-level anonymised records
Supported
Change detection
Only emit updated survey estimates
Supported
Webhook delivery
HTTP POST per record or batch
Supported
Pre-release embargo data
Access to data before public publication
Partial
Title 13 protected microdata
Raw, non-anonymised individual census responses
Partial
Infrastructure

Infrastructure powering the Census pipeline

Open-source tooling on proven cloud infra — no vendor lock-in, full observability.

ScrapyPlaywrightPython 3.12RedisPostgreSQLApache AirflowAWS LambdaS3CloudWatch2CaptchaCapSolverResidential ProxiesDockerKubernetesGrafanaPrometheus
API & FTP Orchestration

Airflow manages complex DAGs to query the Census API, download bulk FTP files, and merge datasets.

Data Normalisation Layer

Python-based transformation pipelines map arcane Census variable codes to human-readable schema definitions.

Cloud-Native Delivery

Pipelines run on ECS and Lambda, pushing columnar Parquet files directly to your cloud data warehouse.

Output & Delivery

Your data, your destination

Data delivered to where your team already works — no new tooling required.

JSON
Newline-delimited or nested — schema versioned per run
CSV
Flat file with typed columns — Excel/Sheets compatible
Parquet
Columnar format for BigQuery, Snowflake, Athena
AWS S3
Direct bucket delivery — compatible with any data lake
Webhook
HTTP POST per record for real-time downstream processing
API
REST endpoint for programmatic access
XLS
Excel compatible for analyst teams
PostgreSQL
Upsert into your existing schema with conflict resolution
S3
Direct bucket delivery — compatible with any data lake
// faq

Common questions.

About census.gov scraping, legality, and pipeline operations.

Ask us directly →
Is scraping census.gov legal?

Yes. US Census data is public domain and explicitly published for public use. We adhere to their API terms of service and usage guidelines.

Do you use the Census API or scrape the website?

We primarily use the official Census API and bulk FTP servers for structured data extraction. We only scrape web interfaces for metadata or unindexed reports.

How do you handle cryptic variable names?

We integrate the Census Bureau's metadata dictionaries into our pipeline, automatically renaming variables like 'B19013_001E' to 'median_household_income'.

Can you extract data at the block group level?

Yes. We can traverse geographic hierarchies down to the block group level using standard FIPS codes.

How often is the data updated?

We schedule pipelines based on the Census Bureau's release calendar, ensuring you receive new ACS or Decennial data as soon as it is published.

Do you provide TIGER/Line geographic data?

Yes. We can extract TIGER/Line shapefiles and convert them into standard spatial formats like GeoJSON or WKT for your GIS systems.

What is the minimum viable engagement?

Our smallest packages start at defined state-level extractions. For national, multi-survey pipelines, we price based on compute and delivery frequency.

$ dataflirt scope --new-project --source=census.gov ready

Tell us what
to extract.
We do the rest.

20-minute scoping call. Pilot dataset within the week. Production within two. Whether you need a one-off demographic dump or a continuous pipeline for economic indicators — we scope, build, and operate the pipeline. Tell us what you need.

hello@dataflirt.com · Bengaluru · IST · typical reply < 4h
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