PI · Campo Maior immediate region

São João da Serra: how it voted for president

In the 2026 runoff, Lula won São João da Serra with 78.85% of valid votes against 21.15% for Flavio Bolsonaro: a margin of 57.70 points, 54.13 points left of Brazil.

Solid left

Lean versus Brazil: −59.79pts; Weighted mean of the municipality's right − left margin minus Brazil's in the 2026, 2022, 2018 and 2014 runoffs.
Electorate (2026): 6,904; 83th largest electorate in Piauí
Side changes: 1; 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.

São João da Serra−57.70 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)78.85% Flavio Bolsonaro (PL)21.15%	−57.70 pts	Left bloc	78.04%
2026 10/04/2026	Round 1	Lula (PT)74.99% Flavio Bolsonaro (PL)20.27% Escritor Augusto Cury (AVANTE)2.02% Ronaldo Caiado (PSD)1.42% +8 more Renan Santos (MISSÃO)1.11% Zema (NOVO)0.09% Samara (UP)0.05% Clariana Barao (DC)0.04% Hertz Dias (PSTU)0.00% Edmilson Costa (PCB)0.00% Rui Costa Pimenta (PCO)0.00% Veterinário Wilson Grassi (DEMOCRATA)0.00%	−54.13 pts	Left bloc	82.55%
2022 10/30/2022	Round 2	Lula (PT)82.40% Jair Bolsonaro (PL)17.60%	−64.80 pts	Left bloc	76.19%
2022 10/02/2022	Round 1	Lula (PT)79.21% Jair Bolsonaro (PL)15.38% Ciro Gomes (PDT)2.66% Simone Tebet (MDB)2.12% +7 more Soraya Thronicke (UNIÃO)0.39% Padre Kelmon (PTB)0.14% Felipe D Avila (NOVO)0.06% Vera (PSTU)0.02% Sofia Manzano (PCB)0.02% Constituinte Eymael (DC)0.00% Léo Péricles (UP)0.00%	−63.80 pts	Left bloc	79.54%
2018 10/28/2018	Round 2	Fernando Haddad (PT)82.08% Jair Bolsonaro (PSL)17.92%	−64.16 pts	Left bloc	78.75%
2018 10/07/2018	Round 1	Fernando Haddad (PT)67.97% Ciro Gomes (PDT)15.14% Jair Bolsonaro (PSL)11.74% Geraldo Alckmin (PSDB)2.03% +9 more Henrique Meirelles (MDB)0.90% Cabo Daciolo (PATRI)0.83% Marina Silva (REDE)0.64% João Amoêdo (NOVO)0.41% Alvaro Dias (PODE)0.13% Vera (PSTU)0.11% Eymael (DC)0.06% Guilherme Boulos (PSOL)0.04% João Goulart Filho (PPL)0.00%	−67.80 pts	Left bloc	85.27%
2014 10/26/2014	Round 2	Dilma (PT)73.42% Aécio Neves (PSDB)26.58%	−46.84 pts	Left bloc	69.03%
2014 10/05/2014	Round 1	Dilma (PT)69.57% Aécio Neves (PSDB)18.71% Marina Silva (PSB)10.84% Luciana Genro (PSOL)0.42% +4 more Levy Fidelix (PRTB)0.16% Eduardo Jorge (PV)0.16% Zé Maria (PSTU)0.07% Pastor Everaldo (PSC)0.07%	−62.12 pts	Left bloc	74.63%
2010 10/31/2010	Round 2	Dilma (PT)64.72% José Serra (PSDB)35.28%	−29.44 pts	Left bloc	70.80%
2010 10/03/2010	Round 1	Dilma (PT)63.67% José Serra (PSDB)27.92% Marina Silva (PV)8.16% Plínio (PSOL)0.15% +4 more Zé Maria (PSTU)0.03% Ivan Pinheiro (PCB)0.03% Eymael (PSDC)0.03% Rui Costa Pimenta (PCO)0.03%	−44.11 pts	Left bloc	76.16%
2006 10/29/2006	Round 2	Lula (PT)64.12% Geraldo Alckmin (PSDB)35.88%	−28.24 pts	Left bloc	70.09%
2006 10/01/2006	Round 1	Lula (PT)57.96% Geraldo Alckmin (PSDB)38.53% Cristovam Buarque (PDT)2.00% Heloísa Helena (PSOL)1.26% +3 more Ana Maria Rangel (PRP)0.20% Luciano Bivar (PSL)0.02% José Maria Eymael (PSDC)0.02%	−22.44 pts	Left bloc	79.59%
2002 10/27/2002	Round 2	Lula (PT)54.73% José Serra (PSDB)45.27%	−9.45 pts	Left bloc	69.59%
2002 10/06/2002	Round 1	Lula (PT)42.08% José Serra (PSDB)34.42% Ciro (PPS)13.86% Garotinho (PSB)9.53% +1 more Zé Maria (PSTU)0.12%	−31.17 pts	Left bloc	83.29%
1998 10/04/1998	Round 1	Fernando Henrique (PSDB)45.50% Ciro Gomes (PPS)23.83% Lula (PT)21.39% Brigadeiro Ivan Frota (PMN)1.99% +8 more João de Deus Barbosa (PT do B)1.96% Enéas (PRONA)1.44% Eymael (PSDC)1.06% Zé Maria (PSTU)0.58% Sergio Bueno (PSC)0.58% Sirkis (PV)0.58% Thereza Ruiz (PTN)0.55% Vasco Neto (PSN)0.52%	−0.69 pts	Left bloc	67.25%
1994 10/03/1994	Round 1	Fernando Henrique Cardoso (PSDB)64.13% Luiz Inacio Lula da Silva (PT)19.29% Orestes Quercia (PMDB)8.89% Carlos Antonio Gomes (PRN)3.09% +4 more Eneas Ferreira Carneiro (PRONA)2.46% Leonel de Moura Brizola (PDT)0.95% Esperidiao Amin Helou Filho (PPR)0.70% Hernani Goulart Fortuna (PSC)0.49%	+59.52 pts	Right bloc	74.68%

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

Other municipalities in the Campo Maior 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.