2018 Illinois precinct and election shapefile.

## RDH Date retrieval
06/07/2021

## Sources
Election results from Illinois State Board of Elections
(https://www.elections.il.gov/electionoperations/votetotalsearch.aspx)

Precinct shapefile from the U.S. Census Bureau's 2020 Redistricting Data Program final release except Tazewell County is from the U.S. Census Bureau's Phase 2 release.

## Fields metadata

Vote Column Label Format
------------------------
Columns reporting votes follow a standard label pattern. One example is:
G16PREDCli
The first character is G for a general election, P for a primary, S for a special, and R for a runoff.
Characters 2 and 3 are the year of the election.
Characters 4-6 represent the office type (see list below).
Character 7 represents the party of the candidate.
Characters 8-10 are the first three letters of the candidate's last name.

Office Codes
A## - Ballot amendment, where ## is an identifier
AGR - Commissioner of Agriculture
ATG - Attorney General
AUD - Auditor
CFO - Chief Financial Officer
CHA - Council Chairman
COC - Corporation Commissioner
COM - Comptroller
CON - State Controller
COU - City Council Member
CSC - Clerk of the Supreme Court
DEL - Delegate to the U.S. House
GOV - Governor
H## - U.S. House, where ## is the district number. AL: at large.
HOD - House of Delegates, accompanied by a HOD_DIST column indicating district number
HOR - U.S. House, accompanied by a HOR_DIST column indicating district number
INS - Insurance Commissioner
LAB - Labor Commissioner
LND - Commissioner of Public/State Lands
LTG - Lieutenant Governor
MAY - Mayor
MNI - State Mine Inspector
PSC - Public Service Commissioner
PUC - Public Utilities Commissioner
RGT - State University Regent
SAC - State Appeals Court
SBE - State Board of Education
SOC - Secretary of Commonwealth
SOS - Secretary of State
SPI - Superintendent of Public Instruction
SPL - Commissioner of School and Public Lands
SSC - State Supreme Court
TAX - Tax Commissioner
TRE - Treasurer
UBR - University Board of Regents/Trustees/Governors
USS - U.S. Senate

Party Codes
D and R will always represent Democrat and Republican, respectively.
See the state-specific notes for the remaining codes used in a particular file; note that third-party candidates may appear on the ballot under different party labels in different states.

## Fields
G18GOVDPRI - J.B. Pritzker (Democratic Party)
G18GOVRRAU - Bruce Rauner (Republican Party)
G18GOVCMCC - William "Sam" McCann (Conservative Party)
G18GOVLJAC - Grayson Kash Jackson (Libertarian Party)

G18ATGDRAO - Kwame Raoul (Democratic Party)
G18ATGRHAR - Erika Harold (Republican Party)
G18ATGLHAR - Bubba Harsy (Libertarian Party)

G18SOSDWHI - Jesse White (Democratic Party)
G18SOSRHEL - Jason Helland (Republican Party)
G18SOSLDUT - Steve Dutner (Libertarian Party)

G18COMDMEN - Susana A. Mendoza (Democratic Party)
G18COMRSEN - Darlene Senger (Republican Party)
G18COMLBAL - Claire Ball (Libertarian Party)

G18TREDFRE - Michael W. Frerichs (Democratic Party)
G18TRERDOD - Jim Dodge (Republican Party)
G18TRELLEH - Michael Leheney (Libertarian Party)

## Processing Steps
The following modifications were made to match precinct boundaries in use for the 2018 general election.

Clay: Split Clay City 1/2, Harter 1/2, Larkinsburg 1/2, Pixley 1/2
Kankakee: Split Kankakee 4/5, 8/11, Otto 1/3, St. Anne 1/2
Lawrence: Split Bridgeport 4/5, 6/7
Winnebago: Merge Cherry Valley 1/12, 4/9, Harlem 4/19, 16/18; Adjust Rockton 5/11/12/13