The name of the settlement Tomarovka comes from the surname of its owner in the late 17th century, Ivan Tomarov. He and his sons, Boris and Vasily, owned this land from 1690 to 1698. The first inhabitants of Tomarovka were runaway serfs who actively migrated to the "Ukrainian cities" of the Belgorod border in the second half of the 17th century.

In the early 18th century, the settlement became the estate of Count Gavriil Ivanovich Golovkin, a close associate of Peter I. Golovkin settled Cossacks here, immigrants from Ukraine, who were granted privileges such as eternal land ownership and duty-free trade. The Cossacks engaged in handicrafts, with leather production being particularly prominent. The culture and speech of the residents of Tomarovka testify to their connection with Ukraine and the Dnieper region.

As Golovkin's estate, Tomarovka attracted trade and markets from Karpov, thanks to its convenient location and significant population. By the mid-18th century, it became one of the main settlements of the Karpov district, leading to the shift of the socio-economic center from Karpov to Tomarovka.

In 1802, Tomarovka volost was formed, which became part of the Belgorod district of the Kursk province. In the first half of the 19th century, the settlement passed to the princely family of Saltykovs, due to family ties. By the mid-19th century, it belonged to collegiate assessor Prince Alexei Alexandrovich Saltykov.

By the end of the 19th century, there were three stone churches in Tomarovka: the Church of the Archangel Michael, the three-altar Nikolskaya Church (built in 1851 and dismantled in 1938-1939), and the Kazan Church (built in 1869), which has survived to this day.

The Church of the Archangel Michael, built in 1841 in the center of Tomarovka, was designed in the classical style and had a cross shape with a tall bell tower. In the early 1930s, it was closed, the bell tower was dismantled, and the building was used as a granary. In the autumn of 1941, the church burned out from the inside, and during the liberation of Tomarovka in 1943, it was heavily damaged. In 1946-1947, it was blown up, and the bricks were used to build the district House of Culture, which burned down in December 1991.