Smith won the senior girls shot put with 14.42m.
Andrews-Paul was second in the senior girls 400m final in 57.60s and Howden was third in the senior boys 100m final in a time of 11.14s.
The full list of Wairarapa placings at the national championships:
Girls
Junior girls 100m: Heats: Toyah Churton (Kuranui College) 13.22 21, Charlotte Whyte (St Matthew's Collegiate) 13.86 45. Quarter-finals: Churton 13.44s 24.
Junior girls 200m: Heats: Charlotte Whyte 29.26s 40.
Junior girls 3000m: Final: Grace Burmeister (Tararua College) 10m 58.11s 7.
Junior girls long jump: Final: Toyah Churton 5.26m 4.
Junior girls triple jump: Final: Toyah Churton 9.81m 10.
Senior girls 100m: Heats: Sian Chapman (Chanel College) 12.85s 18. Semifinals: Sian Chapman 12.96s 15.
Senior girls 200m: Heats: Sian Chapman 26.26s 6. Semifinals: Sian Chapman 26.72s 13.
Senior girls 400m: Heats: Alison Andrews-Paul (Wairarapa College) 58.37s 7. Final: Alison Andrews-Paul 57.60s 2.
Senior girls 100m hurdles: Final: Kate Plimmer (St Matthew's Collegiate) 15.09s 6.
Senior girls long jump: Final: Kate Plimmer 5.44m 4.
Senior girls shot put: Final: Katie Smith (Wairarapa College) 14.42m 1.
Senior girls discus throw: Final: Emma Kruszona (Wairarapa College) 29.97m 12, Katie Smith (Wairarapa College) 28.75m 13.
Senior girls hammer throw: Final: Emma Kruszona 46.19m 4.
Boys
Junior boys 100m: Heats: Finn Yeats (Rathkeale College) 11.18s 1. Quarter-finals: Finn Yeats 11s 1. Semifinals: Finn Yeats 11.18s 1. Final: Finn Yeats 11.06s 1.
Junior boys 200m: Heats: Finn Yeats 22.70s 1, Liam Montgomery (Chanel College) 24.75s 27. Quarter-finals: Finn Yeats 22.84s. Semifinals: Finn Yeats 22.78s 1. Finals: Finn Yeats 22.36s.
Junior boys 400m: Heats: Liam Montgomery 54.69s 16. Semifinals: Liam Montgomery 56.51s 19.
Junior boys 800m: Heats: Vanya Arnopp (Rathkeale College) 2m 31.88s 30.
Junior boys long jump: Final: Liam Montgomery 5.45m 13.
Junior boys shot put: Final: Jackson Hunter (Rathkeale College) 10.48m 18.
Junior boys discus: Final: Jackson Hunter 37.31m 16.
Senior boys 100m: Heats: Alex Howden (Makoura College) 11.06s 9. Quarter-finals: Alex Howden 10.98s 8. Semifinals: Alex Howden 11.20s 5. Final: Alex Howden 11.14s 3.
Senior boys 200m: Heats: Alex Howden 22.92s 5. Semifinals:Alex Howden 23.77s 16.
Senior boys 400m: Heats: Dhruv Raman (Rathkeale College) 51.83s 8, Dylan Lord-Bune (Rathkeale College) 55.14s 29, Edward Hewitt (Rathkeale College) disqualified. Semifinals: Dhruv Raman 51.55s 8. Final: Dhruv Raman 52.87s 8.
Senior boys 800m: Heats: Dylan Lord-Bune 2.06.64 28.
Senior boys shot put: Final: Tom Quinn (Rathkeale College) 12.59m 16.
Senior boys discus: Final: Tom Quinn 37.41m 12.
Senior boys hammer throw: Final: Tom Quinn 58.93m 2.
Junior boys PA 11 100m: Final: Jamie Davidson (Tararua College) 19.31s 3.
Junior Boys PA 11 200m: Final: Jamie Davidson 45.05s 3.
Senior boys PA 11 100m: Final: Keelan Ward (Wairarapa College) 13.80s 6.
Senior Boys PA 11 200m: Final: Keelan Ward 28.49s 4.
Senior boys PA 11 400m: Final: Keelan Ward 66.21s 5.