Râmnicelu is located in the northwestern part of the county, 25 km (16 mi) north of the town of Ianca and 35 km (22 mi) west of the county seat, the city of Brăila.

County road DJ221, which runs from Brăila to Iancu, passes through Râmnicelu village.

Its neighbors are the following communes: Scorțaru Nou to the northeast, Gemenele to the east, Movila Miresii to the south, Șuțești to the southwest, and Racovița to the west and northwest.

It was in Ion Sion, part of Râmnicelu, that on 10 August 1951, Romania's hottest temperature on record, 44.5 °C (112.1 °F), was observed.

[2][3] Much of the phreatic zone under Râmnicelu is contaminated with nitrates and nitrites, which are chemicals that cannot be eliminated by boiling the water from wells.