US Election Infrastructure

A reference guide to how American elections are administered — from federal agencies down to individual precincts, including the vendors that supply the technology.

Information sourced from official agency websites, the EAC, CISA, Ballotpedia, and Wikipedia. No information is fabricated.
How US elections work: Elections in the United States are highly decentralized. The federal government sets minimum standards and provides assistance, but states have primary authority over how elections are run. Within each state, much of the day-to-day administration falls to roughly 8,000 county and local election jurisdictions. There is no single national election system — there are thousands of them.
~8,000
Election Jurisdictions
~180,000+
Precincts Nationwide
158M+
Ballots Cast in 2024
~3
Major Equipment Vendors
50
State Systems (+ DC + territories)
📊 Full Hierarchy — Click any level to go to its detail page
LEVEL 1 Federal funding · guidelines · cybersecurity · voting rights · threat intelligence EAC CISA FEC DOJ Voting Section ODNI Details → authority flows down LEVEL 2 State certifies results · voter reg database · sets election rules · trains counties Sec. of State (38 states) State Bd. of Elections (~7) NASED NASS Details → LEVEL 3 County / Local (~8,000 jurisdictions) registers voters · programs machines · recruits poll workers · counts ballots County Clerk Board of Elections Supervisor of Elections Town Clerk Details → LEVEL 4 Precinct (~180,000+ nationwide) bipartisan teams · voter check-in · ballot issuance · close and seal polls Chief Judge Election Judges Poll Workers Poll Watchers Details → ↑ Vendors supply technology to State and County levels ↑ TECHNOLOGY Voting System Vendors tabulators · ballot-marking devices · e-pollbooks · election management systems · ~90% market = top 3 ES&S (~42 states) Liberty Vote (27 states) Hart InterCivic Clear Ballot KnowInk Details →
The Hierarchy — Click any level to expand
1
Federal Level
EAC · CISA · FEC · DOJ Voting Section · ODNI

The federal government does not run elections — states do. Federal agencies provide funding, security assistance, voluntary guidelines, voting rights enforcement, and foreign threat intelligence. The key distinction: the EAC handles election administration assistance; CISA handles cybersecurity; the FEC handles campaign finance (not election administration).

Election Assistance Commission (EAC)

Only federal agency dedicated to election administration. Certifies voting equipment, distributes HAVA funds, publishes election data.

CISA (DHS)

Lead federal agency for election security. Provides free cybersecurity assessments and threat intelligence to state/local election offices.

Federal Election Commission (FEC)

Regulates federal campaign finance only. Does NOT administer elections.

DOJ Civil Rights — Voting Section

Enforces federal voting rights laws (VRA, NVRA, HAVA, UOCAVA). Deploys election monitors.

ODNI / Intelligence Community

Produces foreign election interference threat assessments and shares intelligence with election officials.

View Federal Level Details →
2
State Level
Secretary of State · State Board of Elections · Election Director · NASED · NASS

States have primary constitutional authority over elections. Each state has a Chief Election Official (CEO) — usually the Secretary of State — who sets statewide rules, certifies results, maintains the voter registration database, and supports county election officials. The structure varies significantly by state.

Secretary of State

Chief Election Official in 38 states. Certifies statewide results, oversees election rules, maintains voter registration database.

State Board of Elections

Used in ~7 states (IL, MD, NC, SC, VA, WI, NY). A bipartisan or nonpartisan board rather than a single official oversees elections.

State Election Director

The administrative professional who implements election policy day-to-day at the state level, typically reporting to the Secretary of State or Board.

NASED

National Association of State Election Directors — professional association for state election directors. Facilitates best-practice sharing.

NASS

National Association of Secretaries of State — oldest nonpartisan public officials organization (est. 1904). Represents state Chief Election Officials.

View State Level Details →
3
County / Local Level
County Clerk · Board of Elections · Supervisor of Elections · Registrar of Voters

This is where most election administration actually happens. Approximately 8,000 county and local jurisdictions are responsible for registering voters, printing ballots, programming voting machines, recruiting poll workers, running early voting, and counting ballots. The office title varies by state.

County Clerk

Common in Midwest and West. Often handles both elections and other county records functions (deeds, licenses).

Supervisor of Elections

Florida's term for the county-level election official. Elected partisan officials in each of Florida's 67 counties.

Board of Elections

Used in Ohio, New York, NC, and others. A bipartisan board at the county level oversees election administration.

City / Town Clerk

In New England states, elections are administered at the city or town level rather than the county level.

View County / Local Level Details →
4
Precinct Level
~180,000+ precincts · Poll Workers · Election Judges · Poll Watchers

Precincts are the smallest geographic unit of election administration — each with a polling place staffed by poll workers (also called election judges or precinct officials). Most states require bipartisan teams of judges at every polling place. Poll workers are recruited and trained by county election offices.

Chief Judge / Inspector

The principal officer at the polling location. Oversees all operations and certifies results at the close of polls.

Election Judge

Verifies voter identity, assists with ballot issuance. States generally require equal numbers of Democrats and Republicans as judges.

Clerk / Poll Worker

Issues ballots, directs voters, handles paperwork. The front-line volunteer workforce of American elections.

Poll Watcher

Authorized observer for a party or candidate. May observe but has no authority to interact with or challenge voters directly.

View Precinct Details →
Voting System Vendors
ES&S · Liberty Vote (Dominion) · Hart InterCivic · Clear Ballot · Unisyn · KnowInk

Private companies supply the voting equipment and software used across the country. Three companies — ES&S, Liberty Vote (formerly Dominion), and Hart InterCivic — control roughly 90% of the market. All voting systems used in federal elections must be certified by the EAC against the Voluntary Voting System Guidelines (VVSG).

ES&S (Election Systems & Software)

Largest vendor. ~42 states. Omaha, NE. Products include DS-series tabulators, ExpressVote BMDs, ExpressPoll e-pollbooks.

Liberty Vote (formerly Dominion)

Second largest. 27 states in 2024. Denver, CO. Acquired from Dominion Voting Systems in October 2025.

Hart InterCivic

Third largest. Austin, TX. Entire states of Hawaii and Oklahoma. Verity platform is an end-to-end system.

Clear Ballot Group

Boston, MA. Specializes in vote-by-mail scanning and independent audit systems.

KnowInk

Leading e-pollbook vendor (Poll Pad). Used for digital voter check-in at precincts across many states.

View Vendor Details →
Sources: U.S. Election Assistance Commission · CISA Election Security · NASED · NASS · Ballotpedia · Wikipedia · Official vendor websites