{
  "meta": {
    "project": "The Aso Rock Index",
    "url": "https://asorockindex.org",
    "license": "CC BY 4.0",
    "generated": "2026-08-12T20:26:27.247Z",
    "endpoint": "/api/elections.json",
    "rows": 7,
    "source": "INEC official declarations + IFES Election Guide for turnout estimates",
    "fields": {
      "year": "Election year",
      "date": "Polling date (calendar)",
      "winner": "Winning candidate's name",
      "winnerParty": "Winning party ticker (PDP, APC, ANPP, …)",
      "winnerVotes": "Number of votes received",
      "winnerPct": "Share of valid votes (%)",
      "runnerUp / runnerUpParty / runnerUpVotes / runnerUpPct": "2nd place equivalents",
      "third / thirdParty / thirdVotes / thirdPct": "3rd place equivalents",
      "total": "Total valid votes cast",
      "margin": "Winner vs runner-up vote share gap (percentage points)",
      "turnout": "Estimated turnout, % of registered voters"
    }
  },
  "data": [
    {
      "year": 1999,
      "date": "27 Feb 1999",
      "winner": "Olusegun Obasanjo",
      "winnerParty": "PDP",
      "winnerVotes": 18738154,
      "winnerPct": 62.78,
      "runnerUp": "Olu Falae",
      "runnerUpParty": "AD",
      "runnerUpVotes": 11110287,
      "runnerUpPct": 37.22,
      "third": null,
      "thirdParty": null,
      "thirdVotes": 0,
      "thirdPct": 0,
      "total": 29848441,
      "margin": 25.56,
      "turnout": 52.3
    },
    {
      "year": 2003,
      "date": "19 Apr 2003",
      "winner": "Olusegun Obasanjo",
      "winnerParty": "PDP",
      "winnerVotes": 24456140,
      "winnerPct": 61.94,
      "runnerUp": "Muhammadu Buhari",
      "runnerUpParty": "ANPP",
      "runnerUpVotes": 12710022,
      "runnerUpPct": 32.19,
      "third": "Others",
      "thirdParty": "OTHERS",
      "thirdVotes": 2315893,
      "thirdPct": 5.87,
      "total": 39482055,
      "margin": 29.75,
      "turnout": 69.1
    },
    {
      "year": 2007,
      "date": "21 Apr 2007",
      "winner": "Umaru Yar'Adua",
      "winnerParty": "PDP",
      "winnerVotes": 24638063,
      "winnerPct": 69.82,
      "runnerUp": "Muhammadu Buhari",
      "runnerUpParty": "ANPP",
      "runnerUpVotes": 6605299,
      "runnerUpPct": 18.72,
      "third": "Atiku Abubakar",
      "thirdParty": "AC",
      "thirdVotes": 2637848,
      "thirdPct": 7.48,
      "total": 35281210,
      "margin": 51.1,
      "turnout": 57.5
    },
    {
      "year": 2011,
      "date": "16 Apr 2011",
      "winner": "Goodluck Jonathan",
      "winnerParty": "PDP",
      "winnerVotes": 22495187,
      "winnerPct": 58.89,
      "runnerUp": "Muhammadu Buhari",
      "runnerUpParty": "CPC",
      "runnerUpVotes": 12214853,
      "runnerUpPct": 31.98,
      "third": "Nuhu Ribadu",
      "thirdParty": "ACN",
      "thirdVotes": 2079151,
      "thirdPct": 5.41,
      "total": 38209978,
      "margin": 26.91,
      "turnout": 53.7
    },
    {
      "year": 2015,
      "date": "28 Mar 2015",
      "winner": "Muhammadu Buhari",
      "winnerParty": "APC",
      "winnerVotes": 15424921,
      "winnerPct": 53.96,
      "runnerUp": "Goodluck Jonathan",
      "runnerUpParty": "PDP",
      "runnerUpVotes": 12853162,
      "runnerUpPct": 44.96,
      "third": "Others",
      "thirdParty": "OTHERS",
      "thirdVotes": 309167,
      "thirdPct": 1.08,
      "total": 28587250,
      "margin": 9,
      "turnout": 43.7
    },
    {
      "year": 2019,
      "date": "23 Feb 2019",
      "winner": "Muhammadu Buhari",
      "winnerParty": "APC",
      "winnerVotes": 15191847,
      "winnerPct": 55.6,
      "runnerUp": "Atiku Abubakar",
      "runnerUpParty": "PDP",
      "runnerUpVotes": 11262978,
      "runnerUpPct": 41.2,
      "third": "Others",
      "thirdParty": "OTHERS",
      "thirdVotes": 875000,
      "thirdPct": 3.2,
      "total": 27329825,
      "margin": 14.4,
      "turnout": 35.6
    },
    {
      "year": 2023,
      "date": "25 Feb 2023",
      "winner": "Bola Tinubu",
      "winnerParty": "APC",
      "winnerVotes": 8794726,
      "winnerPct": 36.61,
      "runnerUp": "Atiku Abubakar",
      "runnerUpParty": "PDP",
      "runnerUpVotes": 6984520,
      "runnerUpPct": 29.07,
      "third": "Peter Obi",
      "thirdParty": "LP",
      "thirdVotes": 6101533,
      "thirdPct": 25.4,
      "total": 24025940,
      "margin": 7.54,
      "turnout": 26.7
    }
  ]
}