Bӑicoi is located in the historical region of Muntenia. It is situated in the center of the county, and stretches for Шаблон:Cvt at its widest. The town is crossed on its southwestern side by the national road DN1, which connects it to the county seat, Ploiești, Шаблон:Cvt to the southeast and Brașov, Шаблон:Cvt to the north. Bӑicoi lies near Florești, a train stop between Ploiești and Câmpina.
The name of the town is derived from "Baicu". At the end of the 19th century, Băicoi was a rural commune, formed by the villages of Băicoi, Cotoiu, Tufeni, and Găgeni, totaling 3,257 inhabitants. The other localities of the current town made up the Țintea commune, which consisted of Țintea, Dâmbu, and Liliești villages, totaling 1,240 inhabitants. Both communes were part of Plasa Filipești, in Prahova County. By 1925, Băicoi commune had 5,946 inhabitants, in Băicoi, Cotoiu, and Tufeni villages (Găgeni village having been assigned to Păulești commune); Țintea commune, in the same composition, had 2,639 inhabitants.
Băicoi commune was declared a town in 1948, at the beginning of the Romanian People's Republic. After the administrative reorganization of 1950, the town became part of the Câmpinaraion of Шаблон:Ill, which was enlarged in 1952 and was renamed Ploiești Region. When the regions were abolished in 1968, Țintea commune with all its villages was assigned to the town of Băicoi, which became part of Prahova County.
