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Matthew Chung Chieh Sin
Office history
Current office and 2026 campaign
Matthew Chung Chieh Sin (listed on the ballot as "Matthew Sin") is a Republican candidate for U.S. House of Representatives, North Carolina's 10th Congressional District, according to the North Carolina State Board of Elections' 2026 candidate filing list 1. Matthew filed for candidacy on December 4, 2025, for a multi-county district including Catawba, Forsyth, Iredell, Lincoln, and Yadkin Counties 1. The race appeared on the March 3, 2026 primary ballot 1. Sin lost that primary, finishing second to Pat Harrigan: 6,509 votes (12.3%) to Harrigan's 46,270 votes (87.7%); Sin will not appear on the November 2026 general-election ballot 4.
Matthew Chung Chieh Sin and Harry Clare Morley Jr. (also profiled on this site) are both filed candidates for this same U.S. House seat, in opposing parties' primaries.
Background
According to the North Carolina voter file, Matthew Chung Chieh Sin is a registered voter in Forsyth County, North Carolina, registered since 2024 (2 years), with party affiliation listed as Republican 2. The voter file shows Matthew Chung Chieh Sin's year of birth as 1976; NC publishes only the year of birth in its bulk voter export, so day and month are not part of the public record 2. The voter history file shows 2 elections voted in since 2024, most recently the 2026-03-03 primary 3.
This biography draws on the North Carolina State Board of Elections' candidate filing records and the state's public voter registration and history files. No additional published biographical information (news coverage, a campaign website, or a Ballotpedia profile) was located. Voters with personal knowledge of Matthew Chung Chieh Sin can reach ballotproject.org with corrections or additions.
Sources
ncvhis_Statewide), published at dl.ncsbe.govresults_pct_20260303), published at dl.ncsbe.gov — accessed 2026-07-24Public filings
Candidates and officeholders are required by law to file campaign finance reports and statements of economic interest. The sites below don't support direct links to an individual record — search by last name on each.
North Carolina — campaign finance
- State, county, and municipal candidates — all in one system — NC State Board of Elections — Committee Search. Search by last name “Sin”.
North Carolina — statement of economic interest
- Required for state-elected and many local officials — NC State Ethics Commission — Statement of Economic Interest Search. Search by last name “Sin”.
Federal offices — campaign finance
- US House, US Senate, and Presidential candidates file with the Federal Election Commission (FEC), not with state systems — FEC candidate search. Filter by office, state, and cycle to narrow the results. Financial disclosures (personal assets and income) for members of Congress and congressional candidates are filed with the US House Clerk or US Senate Office of Public Records, depending on the office.