Hillel Day School, named after the Jewish religious leader, sage and scholar Hillel, is an independent Pre-K – 8 Jewish day school in Farmington Hills, Michigan, a city in the Detroit metropolitan area. Founded in 1958, it became the first non-Orthodox Jewish school in Michigan. It provides both secular and Judaic studies instruction for students from preschool through eighth grade.

Hillel initially rented space from various Jewish organizations. In 1970, it settled into its permanent home in Farmington Hills. In 1980s–1990s, portable classrooms were necessary due to overcrowding. Since then, Hillel's campus has undergone significant expansions and renovations. It now features open-space learning areas, a separate pre-school wing, an indoor gym, all-season outdoor athletic facilities, an "innovation hub" with a greenhouse and makerspace, and a café with a kitchen.

In 2005, Hillel controversially closed the teachers' union. In 2008, Hillel ended its affiliation with the Conservative movement and became a non-denominational Jewish day school.

The Hillel Day School was established in the fall of 1958, after a long period of planning, by a group of Detroit educators, Rabbis and leaders of the community. The group was spearheaded by Rabbi Jacob Segal, who was consequently recognized as the founder of the school and its honorary life president.

The school began with 29 students in the kindergarten and first grade, a further grade being added each following year. By 1960 it grew into a modern elementary day school with 51 students in grades K–3 that offered a blend of Hebraic-religious and general studies, influenced by Conservative Judaism and Zionism. By 1963, enrollment was 115 students in grades K–6. By 1966, Hillel grew up into a K–9 school and, in 1967, held the commencement exercises for its first graduating ninth grade. The next year's graduates were the first students that completed ten years of education at Hillel, from kindergarten at school's founding in 1958 to ninth grade.

In 1970 Hillel moved to its current home in Farmington Hills. The school rapidly grew: the total enrollment went from 270 in 1970 to 533 in 1989 to 636 in 1992 (at those enrollment level, the school had to use portable classrooms) and to 712 in 1997. The school's growth was partially due to the inflow of Jewish immigrants from the Soviet Union: in 1979, Hillel had 20, and in 1992, 49 Russian students.

Hillel was recognized at the time as "a crown jewel of Conservative Judaism in Detroit" because it offered Jewish education "in a form more palatable to some for whom the Beth Yehuda seemed too oldworld". However, it was only in 1979 that Hillel formally affiliated with the Schechter Day School Network of schools that identify with Conservative Judaism.

Hillel went on as a K–9 school for 22 years from 1968 until 1988. Sometime around 1980 the ninth grade became the entry point for local public high schools, and enrollment to Hillel's ninth grade dropped. In 1988, Hillel Day School held graduation exercises for its last graduating ninth grade class. Since then, Hillel continued as a K–8 school.