Los Arrieros is an unincorporated community and census-designated place in Starr County, Texas, United States. As of the 2020 census, Los Arrieros had a population of 43. U.S. Route 83 passes through the community.
According to the U.S. Census Bureau, the community has an area of , all land.
Los Arrieros first appeared as a census designated place in the 2010 U.S. census.
The CDP is within the Roma Independent School District. The zoned elementary school for the 2010 Census community is Emma Vera Elementary School. Roma High School is the district's sole comprehensive high school.