elections_house_county_year
U.S. House of Representatives election results by county. MIT Election Lab county-level returns covering candidate vote totals and two-party shares. Pending data load.
overview
All 3,153 US counties with US House election results. Some counties span multiple congressional districts and are reported per-district.
current vintage — 2024 general election
history — MIT Election Lab county returns: 1976 to present
source & licensing
fields
| name | type | definition |
|---|---|---|
| _ingested_at | timestamp | Timestamp when this record was written to BigQuery.Pipeline metadata field. |
| _ingestor_version | string | Version of the ingestor script that produced this record.Pipeline metadata field. |
| _reliability_tier | string | Data quality tier (A/B/C) assigned at ingestion.Pipeline metadata field. |
| _source_dataset_id | string | Internal dataset identifier linking to meta.datasets.Pipeline metadata field. |
| country_id | string | ISO alpha-2 country code (always 'US' for domestic tables). |
| county_idkey | string | 5-character FIPS code identifying the county.Joins dim.counties on county_id. |
| dem_share_two_party_pct | float64 · percent (0–100) | Democratic share of the two-party vote, calculated as dem_votes / (dem_votes + rep_votes) × 100. Higher values indicate a stronger Democratic performance relative to the Republican candidate. |
| dem_votes | float64 · count | Total votes cast for the Democratic candidate in the U.S. House race for a given county and year. Higher values indicate greater Democratic vote volume. |
| rep_share_two_party_pct | float64 · percent (0–100) | Republican share of the two-party vote, calculated as rep_votes / (dem_votes + rep_votes) × 100. Higher values indicate a stronger Republican performance relative to the Democratic candidate. |
| rep_votes | float64 · count | Total votes cast for the Republican candidate in the U.S. House race for a given county and year. Higher values indicate greater Republican vote volume. |
| state_id | string | 2-character FIPS code identifying the state.Joins dim.states on state_id. |
| total_votes | float64 · count | Total votes cast across all candidates in the U.S. House race for a given county and year. Higher values indicate greater overall voter turnout. |
| yearkey | int64 | Reference year of the observation. |
joins
how to use this table
County-level vote totals harmonized from state SOS reports. House results reported per (county x district x candidate x year).
Precinct-level analysis (use MIT precinct data separately); special elections (general only).
Multi-district counties: votes are summed across all districts within county, which obscures district-level competitiveness. Off-year special elections excluded.