Lakeside Country Park is a country park just south of the town of Eastleigh in Hampshire. The park covers 60 acres and is home to the Eastleigh Lakeside Steam Railway. The park is on the site of old gravel workings, with lakes formed from gravel pits. As well as the lakes themselves, the park boasts meadows and some young woodland. The park is bounded by the Eastleigh urban area to the north, the A335 road to the east, the boundary between Eastleigh and Southampton to the south, and Monks Brook to the west.