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state senate
A state senate district is an area defined by a state in which voters elect representatives to a state legislature's upper chamber. The size of state senate districts varies widely from state to state. In California, state senators represent about 1 million people on average. In North Dakota and Wyoming, state senators represent about 20,000 people on average.
This table includes records for each of the ~2,000 state senate districts in the US, with year-specific entries representing what a given district looked like at a specific point in time.

Schema

Field
Description
year
The year a given district was put into effect.
is latest version
A boolean indicating whether a record represents the latest available version of a given district.
sldu fips
A unique 5-character code, maintained by the US Census, assigned to each district in a state legislature's upper chamber.
sldu name
The district's name, according to the US Census. ("SLDU" is an acronym for "state legislative district upper," which is how the Census refers to these districts.)
state fips
A unique 2-digit code, maintained by the US Census, for the state this district sits within.
state abbreviation
The two-letter abbreviation for the state this district sits within.
state name
The name of the state this district sits within.
shape
A polygon of the district's shape, represented in BigQuery's GEOGRAPHY data type.

Example entry

[
{
"year": "2010",
"is_latest_version": false,
"sldu_fips": "04020",
"sldu_name": "State Senate District 20",
"state_fips": "04",
"state_abbreviation": "AZ",
"state_name": "Arizona",
"shape": "POLYGON((-112.016347 33.370803, -112.016591 33.370742, ...))"
}
]
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Schema
Example entry