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Former member of Congress · last served 113th Congress

Official portrait of Sen. Tom Coburn

Tom Coburn

REPUBLICAN U.S. Senator · OklahomaSenate 2005–2015 · House 1995–2001 (OK-2)

Tom Coburn was a Republican U.S. senator from Oklahoma, first elected to Congress in 1995, who voted with most Republicans on 84% of the 112th Congress’s yes/no votes and sponsored 1 bill that became law (113th–113th Congress).

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31Bills & resolutions sponsored113th–113th Congress (excludes amendments)
1Passed a chamberof 29 substantive bills (excludes resolutions and ceremonial bills)
1Became law1 substantive + 0 ceremonial · 113th–113th Congress
38Broke with partyof 239 yes/no votes, 112th (15.9%)
11Missed votesof 251 roll calls, 112th (4.4%)
—Pork: own shareFY2024 earmarks: not in office

How we count: “Broke with party” is a yes/no roll call where the member voted against most of their own party on that vote (party as recorded; even splits not counted). “Pork: own share” splits each earmark shared by several members evenly among them.

5 most recent votes

5 most recent bills

Top bills sponsored

Laws first, then bills that passed a chamber, were reported from committee, or drew the most cosponsors.

Elections Sen. Coburn has won

Sen. Coburn has won 3 U.S. House elections (1994–1998) and 2 U.S. Senate elections (2004, 2010). Of the contested races, margins ran from 4.1 to 44.5 points.

010204060Margin of victory, points (axis starts at 0)1994, OK-2: won by 4.1 points1994OK-21996, OK-2: won by 10.9 points19961998, OK-2: won by 17.9 points19982004, OK Senate: won by 11.5 points2004OK Senate2010, OK Senate: won by 44.5 points2010
Democratic winRepublican winseat changed partyunopposed
Elections won5 in the data (1976–2024); losses are not listed
Closest win: 4.1 points1994, OK-2
Won an open seat or took one from the other party2 of 5 elections (open seat or changed party)
Seat history, Oklahoma’s 2nd districtWinners, most recent three: Dan Boren (D) 2004–2010 → Markwayne Mullin (R) 2012–2020 → Josh Brecheen (R) 2022–2024. Elections shown, not terms; special elections not included.
Seat history, Oklahoma Senate (class 3)Winners in regular elections, most recent three: Don Nickles (R) 1980–1998 → Tom Coburn (R) 2004–2010 → James Lankford (R) 2016–2022. The seat is next on the ballot in 2028.

Full election history for this seat →

Source: MIT Election Data and Science Lab, U.S. House V15 / U.S. Senate V8 (CC0), retrieved 2026-10-18; winners matched to member records by seat and term. Results run through the 2024 elections; nothing from 2026 is shown until it is certified. A margin is a fact about one election, never a score of how well a member represents anyone, and PORKER does not rank members by it.

How has Oklahoma done while Sen. Coburn served?

2005 to 2014 in Oklahoma: typical household income was up 6% after inflation, the share of people below the poverty line was about the same, and the share of workers looking for a job was down 0.9 points.

Typical household income · after inflationU.S. $71.4KOklahoma $63.2K
Oklahoma: $59.9K in 2005 → $63.2K in 2014
Oklahoma up 6%U.S. down 4%
Share of people below the poverty lineOklahoma 16.6%U.S. 15.5%
Oklahoma: 16.5% in 2005 → 16.6% in 2014
Oklahoma about the sameU.S. up 2.2 points
Share of workers looking for a jobU.S. 7.2%Oklahoma 5.7%
Oklahoma: 6.6% in 2005 → 5.7% in 2014
Oklahoma down 0.9 pointsU.S. up 0.3 points

Each mini chart has its own scale, fitted to its lines (it does not start at zero), so compare the numbers, not the heights. Oxblood = state, grey = U.S.

While they served, not because of them. This shows what happened in Oklahoma during Coburn’s time representing it (2005 to 2015). It does not say what the member did or caused. It is not a score, and PORKER never ranks members on it.

Oklahoma’s borders do not change, so every year is comparable. The Census Bureau has no 2020 yearly estimate.

See the full 20-year record →Source: U.S. Census Bureau, American Community Survey 1-year estimates (tables B19013, B17001, B23001) and BLS CPI-U-RS for inflation, retrieved October 18, 2026. “About the same” means the change is inside the 90% margins of error. Who held the seat: Congress.gov member service records, year level.

Official records on bills this member sponsored

113th Congress. What Congress.gov lists for the 31 bills sponsored.

RecordBillsSource
Bills sponsored31Source: Congress.gov member record, PORKER copy of October 26, 2026 ↗ See them →
With a CBO cost estimate listed4See the 4 →
With a committee report listed5See the 5 →
With a Congress.gov note1See the 1 →
Evidence
How counted
Bills where this member is the lead (first-listed) sponsor in the 113th Congress, read from the stored Congress.gov bill records
Fields
cboCostEstimates, committeeReports, constitutionalAuthorityStatementText, notes
PORKER copy refreshed
October 26, 2026 (nightly)

Read this first. These are counts of records Congress.gov lists. Many bills never get a CBO estimate or a report, so a zero is not a mark against a member. We never show this as a score.

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Data as of Oct 26, 2026 · latest recorded Senate vote Sep 30, 2026 · Sources: Congress.gov, Senate.gov, House Clerk, Appropriations Committee earmark tables. PORKER is non-partisan.