Last updated and checked on November 15, 2022.
50-Yard Freestyle — :21.99, Olivia Smoliga, Glenview (Glenbrook South), 2012 (finals)
100-Yard Freestyle — :48.34, Leah Hayes, Maple Park (Kaneland), 2021 (finals)
200-Yard Freestyle — 1:45.53, Annika Parkhe, Deerfield (H.S.), 2021 (finals)
500-Yard Freestyle — 4:44.87, Rachel Stege, Naperville (Neuqua Valley), 2019 (prelims)
100-Yard Backstroke — :51.43, Olivia Smoliga, Glenview (Glenbrook South), 2012 (finals)
100-Yard Breaststroke — :59.92, Kaelyn Gridley, Winnetka (New Trier), 2021 (prelims)
100-Yard Butterfly — :52.13, Annika Parkhe, Deerfield (H.S.), 2022 (finals)
200-Yard Individual Medley — 1:56.38, Leah Hayes, Maple Park (Kaneland), 2021 (finals)
200-Yard Medley Relay — 1:39.65, Winnetka (New Trier) (Carly Novellline, Kaelyn Gridley, Alexis Wendel, Charlize Escase), 2021 (finals)
200-Yard Freestyle Relay — 1:32.67, Naperville (Neuqua Valley) (Megan Ciezczak, Rachel Stege, Maxine Parkinson, Tiffanie Ruan), 2019 (finals)
400-Yard Freestyle Relay — 3:22.48, Oswego (East) [Coop] (Grace Cooper, Mari Kraus, Emily Giles, Georgia White), 2017 (finals)
Diving — 507.55, Christina Loukas, Deerfield, 2003
50-yard freestyle for athletes with disabilities —
:41.36 Samantha Peters, Peoria (Richwoods) (A), 2013
:25.51 Makayla Nietzel, Crystal Lake (South) [Coop] (B), 2018
100-yard freestyle for athletes with disabilities —
1:30.03 Alyssa Gialamas, Aurora (Waubonsie Valley) (A), 2012
:55.05 Makayla Nietzel, Crystal Lake (South) [Coop] (B), 2019
200-yard freestyle for athletes with disabilities —
3:05.76 Alyssa Gialamas, Aurora (Waubonsie Valley) (A), 2012
2:00.97 Makayla Nietzel, Crystal Lake (South) [Coop] (B), 2018
100-yard breaststroke for athletes with disabilities —
1:35.03 Ahalya Lettenberger, Glen Ellyn (Glenbard West) (A), 2017
1:14.74 Makayla Nietzel, Crystal Lake (South) [Coop] (B), 2019
National Records from National Federation Record Book (online).
50-Yard Freestyle — :21.59, Gretchen Walsh, Nashville Harpeth Hall at Knoxville, TN, 2-7-2020
100-Yard Freestyle — :46.98, Gretchen Walsh, Nashville Harpeth Hall at Knoxville, TN 2-8-2020
200-Yard Freestyle — 1:42.81, Dagny Knutson, Minot, Mandan, ND, 2008
500-Yard Freestyle — 4:34.78, Dagny Knutson, Minot, Mandan, ND, 2008
100-Yard Backstroke — :49.61, Claire Curzan, Raleigh (Cardinal Gibbons), NC, 2-10-2022
100-Yard Breaststroke — :58.35, Kaitlyn Dobler, Beaverton (Aloha), OR, 2-242-2020
100-Yard Butterfly — :49.24, Claire Curzan, Raleigh (Cardinal Gibbons), NC, 2-10-2022
200-Yard Individual Medley — 1:53.73, Torri Huske, Yorktown, VA, 2-25-2021
200-Yard Medley Relay —1:38.13, Fort Collins (Fossil Ridge), CO (Bayley Stewart, Zoe Bartel, Coleen Gillilan, Kylee Alons), 2-11, 2018
200-Yard Freestyle Relay — 1:30.72, Carmel, IN (Veronica Burchill, Claire Adams, Kendall Smith, Trude Rothrock) at Indianapolis, IN, 2-14, 2015
400-Yard Freestyle Relay — 3:14.80, Rancho Santa Margarita Catholic, CA (Macky Hodges, Teia Salvino, Teagan O'Dell, Justina Kozan), 5-14-2022