Ildemaro José Vargas Barreto (born July 16, 1991) is a Venezuelan professional baseball infielder in the Arizona Diamondbacks organization.

He has previously played in Major League Baseball (MLB) for the Minnesota Twins, Chicago Cubs, Pittsburgh Pirates, and Washington Nationals.

He split the 2014 season between Palm Beach and the Double-A Springfield Cardinals, batting .236/.266/.286 with 1 home run and 40 RBI.

In 2016, Vargas split the year between the High-A Visalia Rawhide, the Double-A Mobile BayBears, and the Triple-A Reno Aces, posting a batting line of .305/.360/.400 with 6 home runs and 37 RBI between the three teams.

In 2019, Vargas hit .269/.299/.413 in 92 games for the big league club, notching 6 home runs and 24 RBI.

On September 12, in a game against the Milwaukee Brewers, he hit a home run off of closer Josh Hader.

[12] On April 13, 2021, Vargas was selected to the active roster after Matt Duffy was placed on the COVID-19 injured list.

[18] Vargas immediately joined the active roster, his third team of the season, taking the place of infielder Domingo Leyba, who was designated for assignment.

[23] On December 17, 2021, Vargas signed a minor league contract to return to the Chicago Cubs.

[28] Vargas played in 95 games for Washington in 2024, slashing .246/.295/.316 with one home run, 30 RBI, and nine stolen bases.

On November 4, 2024, Vargas was removed from the 40–man roster and sent outright to the Triple–A Rochester Red Wings, but he rejected the assignment and elected free agency.