Jefferson Antonio Montero Vite (Spanish pronunciation: [ˈɟʝefeɾsom monˈteɾo]; born 1 September 1989) is an Ecuadorian professional footballer who plays as a winger for North West Counties League Premier Division club FC St Helens.

Born in Babahoyo, Los Ríos Province, Montero started playing professionally with Emelec, but first impressed whilst at Independiente José Teran in the Ecuadorian Serie B.

[7] Montero failed to find a regular first-team place at Villarreal, and moved to another La Liga club, Levante, in late January 2011 on loan for the rest of the season.

[12] On 4 January 2013, Montero scored the opening goal of the Clausura, in a 3–3 home draw against Cruz Azul, assisted by international team-mate Joao Rojas.

[25] He made his debut on 20 August as a late substitute in the 2–0 win over Barnsley, and produced a "sparkling ten minute cameo" that earned him 7 out of 10 in the Birmingham Mail's player ratings.

By the time the season was suspended because of the COVID-19 pandemic, he had made 18 appearances in all competitions but only 2 league starts, and Birmingham chose not to attempt to extend his loan to the end of the campaign.

[32] Montero represented Ecuador at the 2007 Pan American Games, and scored in the final match against Jamaica, a 2–1 win which brought the first international trophy in Ecuadorian football history.

[34] Montero made his senior debut for Ecuador on 21 November 2007 in a 2010 FIFA World Cup qualifier at home to Peru, coming on late in the second half in a 5–1 win.