Office briefing
San Mateo — Mayor
Tracked current office. Identifiers stay separate from display names.
Colombia · San Mateo / Boyaca · municipal · MayorCO-ALC-15673
Read the complete original research briefing
Expected ordinary election on the last Sunday of October; formal call and 2027 roster require refresh. CEDE/Registraduría ordinary returns V2. Shares exclude blank and invalid ballots. Changing coalition labels and current control are not harmonized. Repeats, annulments and opposition-seat acceptance require certification review.
1. What office, where, and when is the next election?
- Geography
- San Mateo / Boyaca
- Next election
- 2027-10-31
- Linked upcoming event
- next-2ef5cb20d62bbb03f85b9d12
- Registry qualification
- Unknown
2. How certain is that date?
2027-10-31 is expected (not formally called). Day precision. A date without a formal call is not confirmed.
3. Who won earlier selected elections?
2023
Ordinary · Legal certification not established · list votes
- PARTIDO DE LA U-CAMBIO RADICAL-ALIANZA VERDE50.0%
- UNIDOS POR EL PROGRESO DE SAN MATEO49.6%
- PARTIDO LIBERAL COLOMBIANO0.4%
| Label / candidate | Party code | Votes | Share | Seats | Status |
|---|---|---|---|---|---|
| PARTIDO DE LA U-CAMBIO RADICAL-ALIANZA VERDE · Edgar Gerardo Diaz Angarita | 20230417colombia/Sdc3a3f1f89/2023 | 1,334 | 50% | Unknown | Recorded |
| UNIDOS POR EL PROGRESO DE SAN MATEO · Carol Yiceth Centeno Correa | 20232205colombia/Sdc3a3f1f89/2023 | 1,324 | 49.6% | Unknown | Recorded |
| PARTIDO LIBERAL COLOMBIANO · Ramon De Jesus Sepulveda Osorio | 18480001colombia/Sdc3a3f1f89/2023 | 10 | 0.4% | Unknown | Recorded |
2019
Ordinary · Legal certification not established · list votes
- PARTIDO ALIANZA VERDE52.9%
- COALICION ALCALDIA DE SAN MATEO-BOY. PARTIDO CENTRO DEMOCRATICO Y PARTIDO CONSERVADOR - "ALIANZA POR EL PROGRESO DE SAN MATEO"47.1%
| Label / candidate | Party code | Votes | Share | Seats | Status |
|---|---|---|---|---|---|
| PARTIDO ALIANZA VERDE · Milton Diaz Bonilla | 20090002colombia/S67eb704c85/2019 | 1,417 | 52.9% | Unknown | Recorded |
| COALICION ALCALDIA DE SAN MATEO-BOY. PARTIDO CENTRO DEMOCRATICO Y PARTIDO CONSERVADOR - "ALIANZA POR EL PROGRESO DE SAN MATEO" · Carol Yiceth Centeno Correa | 20191858colombia/S67eb704c85/2019 | 1,260 | 47.1% | Unknown | Recorded |
2015
Ordinary · Legal certification not established · list votes
- PARTIDO CENTRO DEMOCRATICO - MANO FIRME CORAZON GRANDE55.3%
- COALICION ALCALDIA DE SAN MATEO. PARTIDO ALIANZA VERDE Y PARTIDO CAMBIO RADICAL44.7%
| Label / candidate | Party code | Votes | Share | Seats | Status |
|---|---|---|---|---|---|
| PARTIDO CENTRO DEMOCRATICO - MANO FIRME CORAZON GRANDE · Pablo Roberto Estupiñan Sepulveda | 20130001colombia/S8164286948/2015 | 1,419 | 55.3% | Unknown | Recorded |
| COALICION ALCALDIA DE SAN MATEO. PARTIDO ALIANZA VERDE Y PARTIDO CAMBIO RADICAL · Francisco Diaz Bonilla | 20150117colombia/S8164286948/2015 | 1,149 | 44.7% | Unknown | Recorded |
4. Competition and volatility
competition index
Provisional imported-series CI84.820–100 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=0.37481259370314746, oldest_gap=10.514018691588788, previous_gap=5.864774000747104
pedersen volatility
Provisional volatility52.93percentage points
Grouped Pedersen lower bound (percentage points). Ten exact standalone national-party labels. Mixed coalitions, unidentified CEDE codes and other lists stay Other. Changes in coalition participation are not resolved into constituent-party votes. Geographic and actual-event audits remain open. 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=["Conservador","Liberal","La U","Cambio Radical","Centro Democratico","Alianza Verde","ASI","MAIS","Polo","AICO","Other"], interval=Latest interval, vectors=[[0,0.3748125937031484,0,0,0,0,0,0,0,0,99.62518740629685],[0,0,0,0,0,52.93238700037355,0,0,0,0,47.06761299962645],[0,0,0,0,55.257009345794394,0,0,0,0,0,44.742990654205606]]
pedersen volatility
Provisional volatility55.26percentage points
Grouped Pedersen lower bound (percentage points). Ten exact standalone national-party labels. Mixed coalitions, unidentified CEDE codes and other lists stay Other. Changes in coalition participation are not resolved into constituent-party votes. Geographic and actual-event audits remain open. 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: Previous interval
Method pedersen.grouped.v1. Inputs: groups=["Conservador","Liberal","La U","Cambio Radical","Centro Democratico","Alianza Verde","ASI","MAIS","Polo","AICO","Other"], interval=Previous interval, vectors=[[0,0.3748125937031484,0,0,0,0,0,0,0,0,99.62518740629685],[0,0,0,0,0,52.93238700037355,0,0,0,0,47.06761299962645],[0,0,0,0,55.257009345794394,0,0,0,0,0,44.742990654205606]]
pedersen volatility
Provisional volatility54.09percentage points
Grouped Pedersen lower bound (percentage points). Ten exact standalone national-party labels. Mixed coalitions, unidentified CEDE codes and other lists stay Other. Changes in coalition participation are not resolved into constituent-party votes. Geographic and actual-event audits remain open. 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: Both intervals mean
Method pedersen.grouped.v1. Inputs: groups=["Conservador","Liberal","La U","Cambio Radical","Centro Democratico","Alianza Verde","ASI","MAIS","Polo","AICO","Other"], interval=Both intervals mean, vectors=[[0,0.3748125937031484,0,0,0,0,0,0,0,0,99.62518740629685],[0,0,0,0,0,52.93238700037355,0,0,0,0,47.06761299962645],[0,0,0,0,55.257009345794394,0,0,0,0,0,44.742990654205606]]
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.
National context is listed on the polling page. It is not a local forecast.
7. Unresolved issues and sources
Expected ordinary election on the last Sunday of October; formal call and 2027 roster require refresh. CEDE/Registraduría ordinary returns V2. Shares exclude blank and invalid ballots. Changing coalition labels and current control are not harmonized. Repeats, annulments and opposition-seat acceptance require certification review. Six 2023 assemblies remain absent: Amazonas, Guainía, Huila, Risaralda, Vaupés and Vichada. Cali’s 37 JAL boards and dated membership rosters are registered; the national JAL register, three-cycle votes and replacement-event final returns remain incomplete. Twenty mixed-list-type histories, Bogotá and Cali 2015 partial counts and candidate/elected-flag inconsistencies require reconciliation. The national historical portal rejected this browser through security screening. Full legal seat allocation is separate from candidate flags and directory headcounts.
Sources
- Colombia: https://doi.org/10.71590/R2KLKI/BWJDHW · rights unknown
- Colombia: https://doi.org/10.71590/R2KLKI/QVG0NB · rights unknown
- Colombia: https://doi.org/10.71590/R2KLKI/UJ4B6K · rights unknown
- Colombia: CEDE Colombia 2023 alcaldia · rights unknown
- Colombia: CEDE Colombia 2019 alcaldia · rights unknown
- Colombia: CEDE Colombia 2015 alcaldia · rights unknown
Cite this record
Center for Digital Democracy. “San Mateo — Mayor.” Subnational Election Observatory, releaselatin-america-fe5e91689def, snapshot 2026-09-13. /electiondatabase/offices/CO-ALC-15673. Sources: colombia--url-44e0af24e3fef22401f2d269, colombia--url-f8cbad13a2c7112410d7a492, colombia--url-142631271ac95a7106b17681, colombia--Sdc3a3f1f89, colombia--S67eb704c85, colombia--S8164286948.