The National League South, officially known as Enterprise National League South for sponsorship reasons, is a professional Association football league in England. National League South is the second division of the National Leagues and step 2 of the NLS and sixth-highest tier overall in the English football league system, after the Premier League, the EFL leagues and the National League and is contested by 24 clubs.

National League South includes teams from the South East, London, and the South West, as well as teams from Essex. The National League South was introduced in 2004 as part of a major restructuring of the National League System. Each year the champion of the league is automatically promoted to the National League. A second promotion place goes to the winner of a play-off involving the teams finishing in second to seventh place (expanded from four to six teams in the 2017–18 season). The three bottom clubs were relegated to Step 3 leagues.

For sponsorship reasons, it has been known as Blue Square South (2007–2010), Blue Square Bet South (2010–2013), Skrill South (2013–2014), the Vanarama Conference South (2014–2015), the Vanarama National League South (2015–2019) and the Motorama National League South following a three-year sponsorship deal announced in January 2019. Since the start of the 2015–16 season, the league is known as the National League South.

In June 2025, the league was renamed to the Enterprise National League South after the sponsorship deal with Vanarama ended upon completion of the 2024–25 season.

The current member clubs for the 2025–26 season are as follows:

The stadiums of all teams in the league for the 2025–26 season are listed below in capacity order:

** Not promoted. In 2004–05 only three promotion places were available to the Conference National. The third place was decided in a Playoff at Stoke City's Britannia Stadium, which Eastbourne lost 2–1 to the Conference North playoff winners, Altrincham.