Office briefing

SAN CARLOS — Municipal government

Tracked current office. Identifiers stay separate from display names.

Mexico · SAN CARLOS / TAMAULIPAS · municipal · Municipal governmentMX-M-28-34

Read the complete original research briefing

INE result distributions kept separate. Certified seats, supplementary elections, coalition and boundary audit remain.

1. What office, where, and when is the next election?

Geography: SAN CARLOS / TAMAULIPAS
Next election: 2027-06-06
Linked upcoming event: next-8ecb8e470c2ff65eac2ad19b
Registry qualification: Unknown

2. How certain is that date?

2027-06-06 is expected (not formally called). Day precision. A date without a formal call is not confirmed.

3. Who won earlier selected elections?

2024

Special · Legal certification not established · candidate marks

PT_PVEM_MORENA77.3%
PRD14.4%
PAN_PRI4.8%
MC0.0%

Results for event-075aee703cc91fdfb113f34e
Label / candidate	Party code	Votes	Share	Seats	Status
PT_PVEM_MORENA	mexico/S718a84d3ef/2024	3,448	77.3%	Unknown	Recorded
PRD	mexico/S718a84d3ef/2024	643	14.4%	Unknown	Recorded
PAN_PRI	mexico/S718a84d3ef/2024	215	4.8%	Unknown	Recorded
MC	mexico/S718a84d3ef/2024	0 (recorded zero)	0% (recorded zero)	Unknown	Recorded

2021

Special · Legal certification not established · candidate marks

PAN86.2%
PRI4.7%
PRD0.7%
MC0.7%
PVEM0.6%
FXM0.5%
PT_MORENA0.5%
PES0.4%
RSP0.2%

Results for event-819ab6d10149548ec73a27fb
Label / candidate	Party code	Votes	Share	Seats	Status
PAN	mexico/S67a0facb91/2021	3,615	86.2%	Unknown	Recorded
PRI	mexico/S67a0facb91/2021	198	4.7%	Unknown	Recorded
PRD	mexico/S67a0facb91/2021	30	0.7%	Unknown	Recorded
MC	mexico/S67a0facb91/2021	30	0.7%	Unknown	Recorded
PVEM	mexico/S67a0facb91/2021	26	0.6%	Unknown	Recorded
FXM	mexico/S67a0facb91/2021	21	0.5%	Unknown	Recorded
PT_MORENA	mexico/S67a0facb91/2021	19	0.5%	Unknown	Recorded
PES	mexico/S67a0facb91/2021	18	0.4%	Unknown	Recorded
RSP	mexico/S67a0facb91/2021	10	0.2%	Unknown	Recorded

2018

Special · Legal certification not established · candidate marks

PRI67.2%
PAN_PRD_MC25.9%
PT_MORENA_ES2.5%
PANAL0.2%
PVEM0.1%

Results for event-9128612103b820159fdf35aa
Label / candidate	Party code	Votes	Share	Seats	Status
PRI	mexico/S075f558a2c/2018	3,425	67.2%	Unknown	Recorded
PAN_PRD_MC	mexico/S075f558a2c/2018	1,319	25.9%	Unknown	Recorded
PT_MORENA_ES	mexico/S075f558a2c/2018	129	2.5%	Unknown	Recorded
PANAL	mexico/S075f558a2c/2018	8	0.2%	Unknown	Recorded
PVEM	mexico/S075f558a2c/2018	3	0.1%	Unknown	Recorded

4. Competition and volatility

competition index

Provisional imported-series CI

0 (recorded zero)0–100 historical closeness

Actual-event and/or comparability review incomplete

Comparison status: Provisional imported-series comparison; actual-event review open

Method ci.weighted-gap.v1. Inputs: latest_gap=65.14166279609847, oldest_gap=43.120393120393125, previous_gap=86.13561885555836

pedersen volatility

Provisional volatility

97.53percentage points

Grouped Pedersen lower bound (percentage points). Seven exact standalone INE party labels. Joint coalition combinations, independents and other parties remain Other, without allocating coalition votes. This coarse grouped comparison can conceal coalition-member shifts and requires the stated geographic/event review. An interval is withheld if either election has no list mapped to an explicit named group. This is aggregate share change, not individual voter switching. Event review: Actual-event and/or comparability review incomplete

Comparison status: Latest interval

Method pedersen.grouped.v1. Inputs: groups=["PAN","PRI","PRD","PT","PVEM","MC","MORENA","Other"], interval=Latest interval, vectors=[[0,0,14.932652113330237,0,0,0,0,85.06734788666976],[91.12679606755735,4.991177211998992,0.7562389715149987,0,0.6554071086463322,0.7562389715149987,0,1.7141416687673305],[0,70.12694512694513,0,0,0.06142506142506143,0,0,29.81162981162981]]

pedersen volatility

Provisional volatility

93.23percentage points

Comparison status: Previous interval

Method pedersen.grouped.v1. Inputs: groups=["PAN","PRI","PRD","PT","PVEM","MC","MORENA","Other"], interval=Previous interval, vectors=[[0,0,14.932652113330237,0,0,0,0,85.06734788666976],[91.12679606755735,4.991177211998992,0.7562389715149987,0,0.6554071086463322,0.7562389715149987,0,1.7141416687673305],[0,70.12694512694513,0,0,0.06142506142506143,0,0,29.81162981162981]]

pedersen volatility

Provisional volatility

95.38percentage points

Comparison status: Both intervals mean

Method pedersen.grouped.v1. Inputs: groups=["PAN","PRI","PRD","PT","PVEM","MC","MORENA","Other"], interval=Both intervals mean, vectors=[[0,0,14.932652113330237,0,0,0,0,85.06734788666976],[91.12679606755735,4.991177211998992,0.7562389715149987,0,0.6554071086463322,0.7562389715149987,0,1.7141416687673305],[0,70.12694512694513,0,0,0.06142506142506143,0,0,29.81162981162981]]

Source-reported control: Unverified. Current tenure requires separate dated evidence.

5. Officeholder evidence

Dated roster observations are not automatically current tenure. The source current-office flag means this office is tracked now, not that the last winner still holds it.

No officeholder observation supplied.

6. Polling context

No local poll supplied.

7. Unresolved issues and sources

No open research issues attached to this office.

Sources

Mexico: https://sicee-api.ine.mx/api/v1/local/cards/getTarjOnceTablasamunicipiosLoc · rights unknown
Mexico: mx_returns_AYUN_28_34_2024.json · rights unknown
Mexico: mx_returns_AYUN_28_34_2021.json · rights unknown
Mexico: mx_returns_AYUN_28_34_2018.json · rights unknown

Cite this record

Center for Digital Democracy. “SAN CARLOS — Municipal government.” Subnational Election Observatory, releaselatin-america-fe5e91689def, snapshot 2026-09-13. /electiondatabase/offices/MX-M-28-34. Sources: mexico--url-3635e08ffbefd711526cbeea, mexico--S718a84d3ef, mexico--S67a0facb91, mexico--S075f558a2c.