2017–18 National Basketball League (England) season

The 2017-18 season was the 46th edition of the National Basketball League of England. Loughborough University won their 1st league title.

Teams
Team changes

Promoted from NBL2
 * Kent Crusaders
 * Newcastle University

Relegated to NBL2 Folded
 * Essex Leopards
 * Westminster Warriors
 * London Lituanica

Playoffs
Quarter-finals

Semi-finals

Final

Teams
Team changes

Promoted to NBL1 Relegated from NBL1
 * Kent Crusaders
 * Newcastle University
 * Essex Leopards
 * Westminster Warriors

Promoted from NBL3 Relegated to NBL3 Folded
 * Birmingham Elite
 * Middlesex LTBC
 * Sussex Bears
 * East London All-Stars
 * Doncaster Danum Eagles (relegated)
 * Tees Valley Mohawks

Playoffs
Quarter-finals

Semi-finals

Final

Teams
Team changes

Promoted to NBL2 Relegated from NBL2 Folded
 * Birmingham Elite
 * Middlesex LTBC
 * Sussex Bears
 * East London All-Stars
 * Coventry Tornadoes
 * Brunel University

Promoted from NBL4 Relegated to NBL4
 * Manchester Giants II
 * Sunderland University
 * Northants Taurus
 * WLV Albion
 * University of Essex
 * Swindon Shock
 * Cardiff City
 * Sefton Stars
 * Mansfield Giants
 * Thames Valley Cavaliers II

Playoffs
Quarter-finals

Semi-finals

Final

Playoffs
Quarter-finals

Semi-finals

Final