abstract
| - The 2017–18 National League season, known as the Vanarama National League for sponsorship reasons, is the third season under English football's new title of National League, fourteenth season consisting of three divisions and the thirty-eighth season overall.
* Lincoln City, promoted to EFL League Two as champions.
* TBC, promoted to EFL League Two as play-off winners.
* Leyton Orient, relegated to National League after finishing 24th in EFL League Two.
* Hartlepool United, relegated to National League after finishing 23rd in EFL League Two.
* Southport, relegated to National League North after finishing 24th.
* North Ferriby United, relegated to National League North after finishing 23rd.
* Braintree Town, relegated to National League South after finishing 22nd.
* York City, relegated to National League North after finishing 21st.
* Fylde, promoted to National League as champions of the National League North.
* Maidenhead United, promoted to National League as champions of the National League South.
* TBC, promoted to National League as winners of the National League North play-offs.
* TBC, promoted to National League as winners of the National League South play-offs.
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