Hampshire 1 (1987–1993) Originally known as Hampshire 1, it was tier 8 league with promotion up to
London 3 South West and relegation down to
Hampshire 2.
Hampshire 1 (1993–1996) The creation of
National 5 South meant that Hampshire 1 dropped from a tier 8 league to a tier 9 league for the years that National 5 South was active. Promotion and relegation continued to
London 3 South West and
Hampshire 2 respectively.
Hampshire 1 (1996–2000) The cancellation of
National 5 South at the end of the 1995–96 season meant that Hampshire 1 reverted to being a tier 8 league. Promotion and relegation continued to
London 3 South West and
Hampshire 2 respectively.
Hampshire 1 (2000–2009) The introduction of
London 4 South West ahead of the 2000–01 season meant Hampshire 1 dropped to become a tier 9 league with promotion to this new division. Relegation continued to
Hampshire 1.
Hampshire 1 (2009–2018) Hampshire 1 remained a tier 9 league despite national restructuring by the
RFU. Promotion was to
London 3 South West (formerly London 4 South West) and relegation to
Hampshire 2.
Hampshire Premier (2018–present) Restructuring of the Hampshire leagues saw Hampshire 1 renamed as Hampshire Premier. It remained a tier 9 league with promotion to
London 3 South West and relegation to the new
Hampshire 1 (formerly Hampshire 2). ==Promotion play-offs==