NCSBE Voter Registration Descriptive Statistics

Profile of the 2020 Data

I will be using the ncvoter data only for Active voters. I include records only for those registered as Democrat, Republican, or Unassigned, unless otherwise noted. These party affiliations comprise about 99 percent of the registered voters. This report uses the NCSBE ncvoter file datestamped September 26, 2020.

The North Carolina State Board of Elections makes publicly available detailed data on voter registration and voter history. This data can be found at This data is updated weekly, but the old files disappear, so the only persistent data is that which is current.

NCSBE assigns voters to one of five categories: Active, Inactive (have not voted in the past two general elections and are candidates for being removed), Removed, Denied, and Temporary (applicable to military and overseas - this applies to a very small number of persons). Voter registration laws require that each voter have one and only one voter registration record. The NCSBE data includes a unique person identifier, county of residence, date of registration, age on last day of year of registration, race, gender, political party, and various other voting-related data. Political party includes those that are qualified according to North Carolina law, and presently include Constitution, Democrat, Green, Libertarian, Republican, and also Unassigned. In North Carolina, voters can participate in primary elections only for their party affiliation. For the most part, I will concentrate on voters who identify themselves as Democrat, Republican, and Unassigned.

My reports in this series will concentrate on profiles of active voters. This is a slowly changing set of voters, and I will indicate the date of the NCSBE data file that I am using. This allows me to work with “sticky” registrations, those that regardless of when registered, are still active. My reports are written in R using rmarkdown, thereby being generated directly from NCSBE data.

NCSBE data is not perfect. It depends on the actions of county boards of election. Some errors are immediately obvious, such as those for voter age. I have excluded a small number of records that I can identify as erroneous, but others may persist. This is discussed further in Appendix A.

Here are some statewide observations on active voters who appear in the 2020-09-26 ncvoter file. The total number of active voters is 6,230,559. The following plots show gender, race, ethnicity, and party.

Active Voter Demographics
Party Gender Race Ethnicity
category N pct
CST 4,086 0.1
DEM 2,207,192 35.4
GRE 2,960 0.0
LIB 35,422 0.6
REP 1,941,330 31.2
UNA 2,039,563 32.7
category N pct
F 3,147,577 50.5
M 2,638,756 42.4
U 444,220 7.1
category N pct
A 86,968 1.4
B 1,236,739 19.8
I 44,418 0.7
M 34,702 0.6
O 158,160 2.5
P 81 0.0
U 554,273 8.9
W 4,115,212 66.0
category N pct
HL 181,463 2.9
NL 4,519,768 72.5
UN 1,529,322 24.5

Demographics by Party

The following plots are for currently active voters.

Voter Registration of Democrats, Republicans and Independents 2017 to 2020

The following plots apply to the voters who had an Active status in September 2020. They show the number of registrations by month. It is evident that October 2018 and January and August 2020 had particularly high numbers of registrations.

What was happening in October 2018, January and August 2020? The next plots show these months by day. It appears that there were effective voter registration drives on January 3, 2020, and October 12, 2018, with Independents outnumbering the Democrats and Republicans. August 2020 shows a more spread out pattern, with Republicans outnumbering Democrats, although Independents still talley the most.