1999–2000 National League 2 South
The 1999–00 National League 2 South was the thirteenth full season of rugby union within the fourth tier of the English league system, and the last until 2009-10 to use the name National League 2 South. It is counterpart to National League 2 North, which covers the northern half of the country.
At the end of the season, Esher were crowned as champions gaining promotion to the 2000–01 National Division 2, 5 points clear of second place Penzance & Newlyn. At the other end of the table, the first side to go down were Metropolitan Police who had a truly awful campaign with 26 losses from 26 games despite having finished 5th the previous season. They were followed by Norwich and Bridgwater & Albion who were much more competitive but still somewhat short of 12th placed Weston-super-Mare, who finished four points clear. Metropolitan Police and Norwich would drop to London 1 while Bridgwater Albion would fall to South West 1.
The reason National League 2 South had three relegation places compared to National League 2 North was that both of the two teams relegated from the division above were based in the south of the country, requiring more places to accommodate for their arrival the following season.
Structure
Each team played home and away matches against each of the other teams, playing a total of twenty-six matches each. The league champions were promoted to National Division 2 while the bottom three sides dropped to either London 1 or South West 1 depending on locality.Participating teams and locations
| Team | Ground | Capacity | City/Area | Previous season |
| Barking | Goresbrook | 1,000 | Becontree, Dagenham, London | 4th |
| Bridgwater & Albion | Bath Road | 5,000 | Bridgwater, Somerset | 10th |
| Cheltenham | Newlands Park | Southam, Cheltenham, Gloucestershire | 13th | |
| Clifton | Station Road | 2,500 | Cribbs Causeway, Henbury, Bristol | 7th |
| Esher | Molesey Road | 3,500 | Hersham, Surrey | Runners up |
| Metropolitan Police | Imber Court | East Molesey, Surrey | 5th | |
| North Walsham | Norwich Road | 1,200 | Scottow, Norfolk | 3rd |
| Norwich | Beeston Hyrne | Norwich, Norfolk | 6th | |
| Penzance & Newlyn | Mennaye Field | 4,000 | Penzance, Cornwall | Promoted from South West 1 |
| Plymouth Albion | Beacon Park | 3,500 | Plymouth, Devon | 12th |
| Redruth | Recreation Ground | 12,000 | Redruth, Cornwall | 11th |
| Tabard | Cobden Hill | Radlett, Hertfordshire | 8th | |
| Westcombe Park | Goddington Dene | 3,200 | Orpington, London | Promoted from London 1 |
| Weston-super-Mare | Recreation Ground | 6,000 | Weston-super-Mare, Somerset | 9th |