I le masina o Iulai 2017, i le sefululima o ona tausaga, na tauva ai Smith i lana uluai fonotaga faavaomalo tele i le 2017 World Aquatics Championships. Na agavaa o ia mo le tamaʻitaʻi i le 200 mita i tua ma faʻaiʻu lona valu. I le masina o Aokuso, na manumalo ai Smith i pine auro i le 100 mita i tua ma le 200 mita i tua i le 2017 FINA World Junior Swimming Championships
. I le 100 mita faaiu na ia solia Missy Franklin's 15-16 tausaga faʻamaumauga a le atunuʻu, faʻapea foʻi ma le faʻamaumauga a le lalolagi a le lalolagi na faʻatuina muamua e Taylor Ruck i le semifinals. Na ia mauaina le 2017 National Age Group Swimmer of the Year mo le 15-16 tausaga le matutua.