Northampton South is currently held by the Conservative Party, and awaits results.
Results for 2019 are notional estimates based on the new boundaries.
| Votes | Share % | Change %pts. | ||
|---|---|---|---|---|
| Jill Hope Liberal Democrat | − | − | − | |
| Andrew Lewer Conservative | − | − | − | |
| Tony Owens Reform UK | − | − | − | |
| Mike Reader Labour | − | − | − | |
| Katie Simpson Trade Unionist and Socialist Coalition | − | − | − | |
| Simon Sneddon Green | − | − | − | |
| Penelope Tollitt Climate | − | − | − |