PI · Oeiras immediate region

Santo Inácio do Piauí: how it voted for president

In the 2026 runoff, Lula won Santo Inácio do Piauí with 81.78% of valid votes against 18.22% for Flavio Bolsonaro: a margin of 63.56 points, 59.99 points left of Brazil.

Solid leftSwing

Lean versus Brazil: −63.68pts; Weighted mean of the municipality's right − left margin minus Brazil's in the 2026, 2022, 2018 and 2014 runoffs.
Electorate (2026): 3,644; 201th largest electorate in Piauí
Side changes: 3; Times the leading bloc changed from one election to the next, in 9 elections since 1994.
Bellwether?: No; Has voted for the national winner since 2022.

On the map of Piauí

2026 runoff, colored by margin: pale in tight races, deep in landslides. Click a municipality to open its page.

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← Left bloc aheadRight bloc ahead →

Margin in percentage points of valid votes (right − left).

Municipality, state and Brazil

Right − left margin in the 2026 runoff, in percentage points.

Santo Inácio do Piauí−63.56 pts
Piauí−51.75 pts
Brazil−3.57 pts

Negative = left ahead; positive = right ahead.

Margin over time

Right − left margin in each election (the runoff where there was one), compared with Brazil's.

Every election

Year	Round	Candidates (% of valid votes)	Margin (right − left)	Bloc ahead	Turnout
2026 10/25/2026	Round 2	Lula (PT)81.78% Flavio Bolsonaro (PL)18.22%	−63.56 pts	Left bloc	81.37%
2026 10/04/2026	Round 1	Lula (PT)79.94% Flavio Bolsonaro (PL)17.40% Renan Santos (MISSÃO)1.06% Escritor Augusto Cury (AVANTE)0.83% +8 more Ronaldo Caiado (PSD)0.76% Hertz Dias (PSTU)0.00% Edmilson Costa (PCB)0.00% Clariana Barao (DC)0.00% Rui Costa Pimenta (PCO)0.00% Zema (NOVO)0.00% Veterinário Wilson Grassi (DEMOCRATA)0.00% Samara (UP)0.00%	−61.54 pts	Left bloc	84.85%
2022 10/30/2022	Round 2	Lula (PT)86.28% Jair Bolsonaro (PL)13.72%	−72.55 pts	Left bloc	80.89%
2022 10/02/2022	Round 1	Lula (PT)85.22% Jair Bolsonaro (PL)12.58% Ciro Gomes (PDT)1.43% Simone Tebet (MDB)0.26% +7 more Soraya Thronicke (UNIÃO)0.26% Felipe D Avila (NOVO)0.15% Padre Kelmon (PTB)0.04% Vera (PSTU)0.04% Sofia Manzano (PCB)0.04% Constituinte Eymael (DC)0.00% Léo Péricles (UP)0.00%	−73.45 pts	Left bloc	83.55%
2018 10/28/2018	Round 2	Fernando Haddad (PT)83.63% Jair Bolsonaro (PSL)16.37%	−67.27 pts	Left bloc	79.55%
2018 10/07/2018	Round 1	Fernando Haddad (PT)69.02% Jair Bolsonaro (PSL)12.48% Ciro Gomes (PDT)11.31% Geraldo Alckmin (PSDB)4.28% +9 more João Amoêdo (NOVO)1.13% Cabo Daciolo (PATRI)0.69% Henrique Meirelles (MDB)0.40% Marina Silva (REDE)0.28% Alvaro Dias (PODE)0.28% Guilherme Boulos (PSOL)0.12% Vera (PSTU)0.00% Eymael (DC)0.00% João Goulart Filho (PPL)0.00%	−61.47 pts	Left bloc	83.79%
2014 10/26/2014	Round 2	Dilma (PT)66.42% Aécio Neves (PSDB)33.58%	−32.84 pts	Left bloc	70.50%
2014 10/05/2014	Round 1	Dilma (PT)63.62% Marina Silva (PSB)28.49% Aécio Neves (PSDB)7.47% Luciana Genro (PSOL)0.17% +4 more Pastor Everaldo (PSC)0.09% Levy Fidelix (PRTB)0.09% Mauro Iasi (PCB)0.04% Eymael (PSDC)0.04%	−84.64 pts	Left bloc	76.44%
2010 10/31/2010	Round 2	Dilma (PT)75.03% José Serra (PSDB)24.97%	−50.05 pts	Left bloc	71.43%
2010 10/03/2010	Round 1	Dilma (PT)78.43% José Serra (PSDB)15.56% Marina Silva (PV)5.65% Ivan Pinheiro (PCB)0.15% +3 more Zé Maria (PSTU)0.10% Eymael (PSDC)0.05% Levy Fidelix (PRTB)0.05%	−68.67 pts	Left bloc	76.39%
2006 10/29/2006	Round 2	Lula (PT)82.81% Geraldo Alckmin (PSDB)17.19%	−65.62 pts	Left bloc	78.32%
2006 10/01/2006	Round 1	Lula (PT)71.99% Geraldo Alckmin (PSDB)25.29% Heloísa Helena (PSOL)1.34% Cristovam Buarque (PDT)1.25% +2 more Ana Maria Rangel (PRP)0.09% Luciano Bivar (PSL)0.05%	−49.15 pts	Left bloc	87.08%
2002 10/27/2002	Round 2	José Serra (PSDB)60.60% Lula (PT)39.40%	+21.20 pts	Right bloc	78.37%
2002 10/06/2002	Round 1	José Serra (PSDB)55.48% Lula (PT)30.78% Ciro (PPS)11.17% Garotinho (PSB)2.47% +1 more Zé Maria (PSTU)0.10%	+10.97 pts	Right bloc	87.96%
1998 10/04/1998	Round 1	Lula (PT)45.87% Fernando Henrique (PSDB)34.89% Ciro Gomes (PPS)11.72% João de Deus Barbosa (PT do B)1.56% +8 more Brigadeiro Ivan Frota (PMN)1.49% Eymael (PSDC)1.02% Zé Maria (PSTU)0.88% Vasco Neto (PSN)0.81% Enéas (PRONA)0.75% Sirkis (PV)0.47% Thereza Ruiz (PTN)0.34% Sergio Bueno (PSC)0.20%	−23.98 pts	Left bloc	69.26%
1994 10/03/1994	Round 1	Fernando Henrique Cardoso (PSDB)48.03% Luiz Inacio Lula da Silva (PT)35.91% Carlos Antonio Gomes (PRN)6.31% Orestes Quercia (PMDB)5.49% +4 more Eneas Ferreira Carneiro (PRONA)1.88% Esperidiao Amin Helou Filho (PPR)1.19% Leonel de Moura Brizola (PDT)0.64% Hernani Goulart Fortuna (PSC)0.55%	+26.90 pts	Right bloc	71.14%

Percentages of valid votes in the municipality. Turnout = voters over the electorate. Source: TSE.

When the municipality changed sides

1998(Round 1)·Right bloc→Left bloc
2002(Round 2)·Left bloc→Right bloc
2006(Round 2)·Right bloc→Left bloc

Other municipalities in the Oeiras immediate region

Find another municipality

Official TSE results by municipality (1994–2026); the 2026 runoff comes from the TSE's official results publication. Every municipality's index can be downloaded at /dados.