| ACC | Accìon Civico Cristiana Civic Christian Action
 | 1962–1962 | 23.2% |  | 2 |  | 
      
      
        | ADC | Acción Demócrata de Cristo Christian Democratic Action
 | 1960–1960 | 22.4% |  | 0 |  | 
      
      
        | ARNE | Acción Revolucionaria Nacionalista Ecuatoriana Ecuadorian Nationalist Revolutionary Action
 | 1952–1968 | 3.7% |  | 1 |  | 
      
      
        | PAIS | Alianza PAIS PAIS Alliance
 | since 2006 | 52.3% |  | 19 |  | 
      
      
        | CID | Coalición Institucionalista Demócrata Democratic Institutionalist Coalition
 | 1978–1979 | 6.3% |  | 6 |  | 
      
      
        | CFP | Concentración de Fuerzas Populares Concentration of Popular Forces
 | 1949–1983 | 30.9% |  | 13 |  | 
      
      
        | CL | Contra-Liberal Anti-Liberal
 | since 1880 |  |  | 1 |  | 
      
      
        | FNV | Federacion Nacional Velazquista National Velazquist Federation
 | 1952–1984 | 3.0% |  | 4 |  | 
      
      
        | FP | Federación Pontista Pontista Federation
 | 1966–1966 | 19.6% |  | 0 |  | 
      
      
        | FVP | Federaciòn Valesquista de Pichincha Velasquist Federation of Pichincha
 | 1962–1962 | 6.7% |  | 3 |  | 
      
      
        | FDN | Frente Democratico Nacional National Democratic Front
 | 1956–1962 | 5.0% |  | 2 |  | 
      
      
        | FPD | Frente Popular Democratico Democratic People's Front
 | 1954–1954 | 11.8% |  | 2 |  | 
      
      
        | FRA | Frente Radical Alfarista Alfarista Radical Front
 | 1972–1998 | 8.0% |  | 12 |  | 
      
      
        | FE | Fuerza Ecuador Ecuador's Force
 | since 2014 | 4.8% |  | 4 |  | 
      
      
        | FLR | Fuerzas del Liberalismo Radical Forces of the Radical Liberation
 | 1962–1962 | 16.4% |  | 2 |  | 
      
      
        | GN | Gente Nueva New People
 | 1997–1997 | 6.1% |  | 2 |  | 
      
      
        | Gdlv | Grupos disidentes liberales y velasquistas Dissident liberal and Velasqist groups
 | 1956–1956 | 18.0% |  | 0 |  | 
      
      
        | ID | Izquierda Democrática Democratic Left
 | 1970–2013 | 21.8% |  | 19 |  | 
      
      
        | MCDN | Movimiento Civico Democratico Nacional National Democratic Civic Movement
 | 1947–1948 | 18.5% |  | 4 |  | 
      
      
        | CREO | Movimiento Creo, Creando Oportunidades Grow, Creating Opportunities Movement
 | since 2013 | 11.4% |  | 11 |  | 
      
      
        | MUPP  NP | Movimiento de Unidad Plurinacional Pachakutik — Nuevo PaÃs Pachakutik Plurinational Unity Movement — New Country
 | since 1996 | 10.8% |  | 22 |  | 
      
      
        | MIAJ | Movimiento Independiente Amauta Jatari Amauta Jatari Independent Movement
 | 2002–2006 | 0.9% |  | 2 |  | 
      
      
        | MIRA | Movimiento Independiente para una República Auténtica Independent Movement for an Authentic Republic
 | 1996–2000 |  |  | 1 |  | 
      
      
        | MPS | Movimiento Patria Solidaria Solidarity Fatherland Movement
 | since 2002 | 9.3% |  | 2 |  | 
      
      
        | MPD | Movimiento Popular Democrático Democratic People's Movement
 | since 1978 | 6.1% |  | 10 |  | 
      
      
        | RED | Movimiento Red Ética y Democracia Web Ethics and Democracy Movement
 | 2005–2013 | 3.6% |  | 3 |  | 
      
      
        | MRI | Movimiento Republicano Independiente Independent Republican Movement
 | 1966–1966 | 12.6% |  | 0 |  | 
      
      
        | RC | Movimiento Revolución Ciudadana Citizen Revolution Movement
 | since 2010 | 39.7% |  | 1 |  | 
      
      
        | MR | Movimiento Ruptura/Ruptura 25 Rupture Movement
 | since 2013 | 2.5% |  | 1 |  | 
      
      
        | SUMA | Movimiento Suma, Sociedad Unida Más Acción Suma, More Action United Society Movement
 | 2013–2013 | 3.0% |  | 2 |  | 
      
      
        | UNUNO | National Unity Party Partido Unión Nacional
 | since 2002 | 6.4% |  | 2 |  | 
      
      
        | PAPRE | Partido Acción Popular Revolucionaria Ecuatoriana Ecuadorian Revolutionary Popular Action Party
 | 1996–1996 | 3.5% |  | 3 |  | 
      
      
        | PA | Partido Avanza Advance Party
 | 2013–2013 | 2.9% |  | 4 |  | 
      
      
        | PCEFADI | Partido Comunista del Ecuador / Frente Amplio de Izquierda Communist Party of Ecuador / Broad Front of the Left
 | 1926–1995 | 6.1% |  | 6 |  | 
      
      
        | PCE | Partido Conservador Ecuatoriano Ecuadorian Conservative Party
 | 1855–2002 | 7.8% |  | 15 |  | 
      
      
        | PD | Partido Demócrata Democrat Party
 | 1984–1988 | 9.1% |  | 5 |  | 
      
      
        | PLRE | Partido Liberal/Partido Liberal Radical Ecuatoriano Liberal Party/Eduadorian Radical Liberal Party
 | 1925–2002 | 8.0% |  | 14 |  | 
      
      
        | PL | Partido Libertad Liberty Party // Freedom Party
 | 2001–2003 | 1.0% |  | 2 |  | 
      
      
        | PNR | Partido Nacionalista Revolucionario Revolutionary Nationalist Party
 | 1979–1984 | 7.5% |  | 5 |  | 
      
      
        | PRIAN | Partido Renovador Institucional Acción Nacional Institutional Renewal Party of National Action
 | 2002–2014 | 16.3% |  | 13 |  | 
      
      
        | PRE | Partido Roldosista Ecuatoriano Ecuadorian Roldosist Party
 | 1982–2014 | 20.4% |  | 16 |  | 
      
      
        | PSC | Partido Social Cristiano [Movimiento] Social Christian Party [Movement]
 | since 1951 | 30.4% |  | 19 |  | 
      
      
        | PSP | Partido Sociedad Patriótica Patriotic Society Party
 | since 2002 | 8.1% |  | 22 |  | 
      
      
        | PUR | Partido Unidad Republicana Republican Unity Party
 | 1992–1992 | 17.6% |  | 9 |  | 
      
      
        | UNUNO | Partido Union Nacional-UNO National Union Party - UNO
 | since 1979 | 8.9% |  | 0 |  | 
      
      
        | PP | Progressive Party Partido Progresista
 | since 1883 |  |  | 3 |  | 
      
      
        | PCP | Pueblo Cambio y Democracia Party for People, Change and Democracy
 | 1984–1990 | 2.7% |  | 1 |  | 
      
      
        | PS  FA | Socialist Party — Broad Front Partido Socialista — Frente Amplio
 | since 1926 | 6.9% |  | 15 |  | 
      
      
        | UDCDP | Unión Demócrata Cristiana / Democracia Popular Christian Democratic Union / Popular Democracy
 | 1977–2013 | 35.0% |  | 21 |  | 
      
      
        | ally | alliance alliance
 |  |  |  | 11 |  | 
      
      
        | tech | technical technical
 |  |  |  | 1 |  | 
      
      
        | perc | 1 percent 1 percent
 |  |  |  | 1 |  | 
      
      
        | unknown | unknown unknown
 |  |  |  | 4 |  | 
      
      
        | indep | independent independent
 |  |  |  | 3 |  | 
      
      
        | etc | other other
 |  |  |  | 3 |  |