Drolsum is a small village in Modum municipality in Buskerud, Norway.^{[citation needed]}

Drolsum is located on the western bank of Tyrifjorden on Norwegian county road 35 (Fv 35) which runs between Langebru in Øvre Eiker and Tønsberg in Vestfold. Drolsum had a train station (Drolsum stoppestedon) in the Randsfjordbanen between Vikersund and Nakkerud. The rail station was opened during 1903.The original station building was demolished and replaced with a new office in 1946. Around 1973 it downgraded to stop. It is listed on the Norwegian National Rail Administration Network and is not officially closed. [1] ^[1]

60°01′N 10°02′E / 60.017°N 10.033°E / 60.017; 10.033