retailopenml/179-adulttabularclassificationbenchmarkucicensusfairnessopenmlincome
Adult (Census Income) — UCI/OpenML Benchmark
About this data
Classic UCI 'Adult' census income dataset (~48K rows, 14 features) for predicting whether income exceeds $50K/yr. Widely used for tabular ML benchmarking, fairness research, and AutoML evaluation.
Schema
| Name | Type | Description |
|---|---|---|
| age | VARCHAR | Individual age in years. |
| workclass | VARCHAR | Employment type: Private, Self-emp-inc, Self-emp-not-inc, Federal-gov, Local-gov, State-gov, Without-pay, Never-worked. |
| fnlwgt | DOUBLE | Census final weight for population representation. |
| education | VARCHAR | Highest education level: Preschool, 1st-4th, 5th-6th, 7th-8th, 9th, 10th, 11th, 12th, HS-grad, Some-college, Assoc-aacm, Assoc-voc, Bachelors, Masters, Prof-school, Doctorate. |
| education-num | UTINYINT | Education level encoded as integer from 1 to 16. |
| marital-status | VARCHAR | Marital status: Married-civ-spouse, Married-spouse-absent, Married-AF-spouse, Never-married, Divorced, Widowed, Separated. |
| occupation | VARCHAR | Occupation category: Tech-support, Craft-repair, Other-service, Sales, Exec-managerial, Prof-specialty, Protective-serv, Armed-Forces, Priv-house-serv, Machine-op-inspct, Transportation, Handlers-cleaners, Farming-fishing, Adm-clerical. |
| relationship | VARCHAR | Household relationship: Wife, Own-child, Husband, Not-in-family, Other-relative, Unmarried. |
| race | VARCHAR | Race category: White, Black, Asian-Pac-Islander, Amer-Indian-Eskimo, Other. |
| sex | VARCHAR | Gender: Male or Female. |
| capitalgain | VARCHAR | Capital gains in US dollars. |
| capitalloss | VARCHAR | Capital losses in US dollars. |
| hoursperweek | VARCHAR | Typical work hours per week. |
| native-country | VARCHAR | Country of origin or residence. |
| class | VARCHAR | Annual income threshold: >50K or <=50K. |
Sample Data
Preview a sample of the data before downloading.
Free
Open dataset
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Seller: DataBazaar
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Via MCP Server
# 1. Add to your agent's MCP config (claude_desktop_config.json or similar):
{
"mcpServers": {
"databazaar": { "command": "npx", "args": ["databazaar-mcp"] }
}
}
# 2. Your agent can then call:
search_datasets({ query: "Adult (Census Income) — UCI/Op" })
// Found: a1e6a3e5-d920-4954-9854-dd4b6ca91b36
get_download_url({ dataset_id: "a1e6a3e5-d920-4954-9854-dd4b6ca91b36" }) // free — no API key neededVia REST API
# Free dataset — no API key required: curl https://api.databazaar.io/datasets/a1e6a3e5-d920-4954-9854-dd4b6ca91b36/download-url