U.S. House Candidate Profile
Updated
John Anthony Olszewski Jr. (born September 10, 1982), also known by his nickname Johnny O, is an American politician who has served as a member of the U.S. House of Representatives from Maryland's 2nd congressional district since 2025. A member of the Democratic Party, he served as the 14th county executive of Baltimore County, Maryland, from 2018 to 2025.
Olszewski served as a student member of the Baltimore County Board of Education from 1999 to 2000, and two terms in the Maryland House of Delegates representing the 6th district from 2006 to 2015. The district covered most of the southeastern portion of Baltimore County, including the town of Dundalk, Maryland. Olszewski unsuccessfully ran for the Maryland Senate in District 6 in 2014, narrowly losing to Republican challenger Johnny Ray Salling. Olszewski became Baltimore County Executive in 2018 after narrowly defeating state senator James Brochin in the 2018 Democratic primary election and defeating former state Insurance Commissioner Alfred W. Redmer Jr. in the general election. Olszewski was re-elected in 2022, defeating Republican nominee Pat McDonough.
Source: Wikipedia, "Johnny Olszewski" (en.wikipedia.org/wiki/Johnny_Olszewski), text available under CC BY-SA 4.0 (creativecommons.org/licenses/by-sa/4.0/). Excerpt of the article's lead section; pronunciation guides and citation markers removed.
Last updated 2026-10-24.
John Anthony Jr. unitedstates.github.io
John Anthony Olszewski Jr.'s FEC candidate id is H4MD02232
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Get a free sample briefProfile status: Active candidate. Roster status: incumbent. Race status: discovered.
No certified general-election roster row matched this profile.
Valid citations 1325. Primary-source references 1325. First seen 2026-05-05. Last seen 2026-10-06. Profile record updated 2026-10-18.
Published claim kinds: Background 6, Statements 22, Finance 5, Votes 702, Controversies 1, Other sourced notes 271, ideology 4.
Other ids: Other voteview:119:22545; Bioguide O000176; Wikidata Q6217866; Vote Smart 67095; Ballotpedia John Olszewski Jr.; OpenSecrets N00054814.
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