Lloydminster Catholic School Division (LCSD) or Lloydminster R.C.S.S.D. No. 89 is a Catholic school division serving approximately 2,800 students in Lloydminster, SK/AB and surrounding area. Lloydminster Catholic School Division operates four elementary schools for grades K-7, one high school for grades 8-12 and one early childhood education center. It is currently the city's sole provider of single-track French Immersion education from grades K-12 through École St. Thomas Elementary School and Holy Rosary High School.

Lloydminster Catholic School Division was established in 1959 and opened its first school, St. Thomas, in 1961. St. Mary's School opened in 1963, initially serving students from grades 9 through 12. With the opening of the public Lloydminster Comprehensive High School in 1968, the Catholic school division relinquished responsibilities of grades 10 through 12 to the public school division and re-purposed St. Mary's School as a junior high school in 1969.

Due to growing enrolment across the division, Father Gorman Elementary School was built in 1977 followed by St. Joseph Elementary School in 1982. By 1985, the division had sufficient facility space and demand to offer Catholic education for grades 10 through 12. St. Mary's School became a high school and was renamed Holy Rosary High School. École St. Thomas also began to offer Lloydminster's first French Immersion program in 1985.

Holy Rosary High School moved to a new facility in the fall of 2001, serving students Grades 8 through 12 with both English and French Immersion learning opportunities. The former facility was once again renamed St. Mary's School. The construction of the new Holy Rosary High School included adjacent office space for the division office. École St. Thomas School moved to a newly built facility in the fall of 2013, with the former building being re-purposed as Mother Teresa Early Childhood Education Center.

On June 23, the Saskatchewan Government announced that Holy Rosary High School will receive part of $110.5 million total given to six schools across the province.In September, the division announced that they received $10 Million from the Government of Saskatchewan to fund an expansion for Holy Rosary High School. The project included the expansion of the south wing, complete with a new common space, new classrooms, STEM labs, a new art studio, as well as an e-sports lab. The construction on the new wing started at the end of 2021, and opened to students in February 2023. The expansion also included a new welding lab, which opened a couple months before the wing. The final portion of the expansion is an addition to the library, which is set to open in the fall of 2023.

• Father Gorman Community School
• Holy Rosary High School
• St. Joseph Elementary School
• St. Mary's Elementary School
• École St. Thomas Elementary School
• Mother Teresa Early Childhood Education Center

• Lloydminster Catholic School Division