Jillian Cox

b. 2005 (21)

Personal Bests

Best times from available individual swims and official relay lead-offs. Career coverage may be incomplete. Select an event to show its progression.

2023 TYR Pro Swim Series - Knoxville · Knoxville, United States of America · Meet 11–14 Jan 2023

—56.95

2024 Speedo Summer Championships · Meet 23–27 Jul 2024

—1:58.47

2024 Speedo Summer Championships · Meet 23–27 Jul 2024

—4:06.31

2023 World Aquatics Championships - Fukuoka · Meet 14–30 Jul 2023

—8:19.73

2025 Toyota U.S. National Championships · Indiana University Natatorium, Indianapolis, IN · Meet 3–7 Jun 2025

—16:05.88

All Results 92 swims · 21 meets

Meet dates describe the competition. Race dates are shown per swim where available.

2026 NCAA DI Women's Swimming & Diving · Meet 18–21 Mar 2026

500y Freestyle SCY18 Mar 2026

18 Mar 2026Championship Final24:31.56

500y Freestyle SCY18 Mar 2026

18 Mar 2026Preliminary14:33.89

1650y Freestyle SCY18 Mar 2026

18 Mar 2026Final115:32.26

2026 SEC Swimming and Diving Championships · Meet 16–21 Feb 2026

500 Freestyle SCY

—Championship Final14:30.53

500 Freestyle SCY

—Preliminary44:38.49

1650 Freestyle SCY

—Final115:32.75

2025 Toyota U.S. National Championships · Indiana University Natatorium, Indianapolis, IN · Meet 3–7 Jun 2025

800 Freestyle LCM

—Heat38:19.88

1500 Freestyle LCM

—Heat316:05.88

2025 NCAA DI Women's Swimming & Diving · Federal Way, WA · Meet 19–22 Mar 2025

500y Freestyle SCY19 Mar 2025

19 Mar 2025Championship Final14:31.58

500y Freestyle SCY19 Mar 2025

19 Mar 2025Preliminary34:35.84

1650y Freestyle SCY19 Mar 2025

19 Mar 2025Final115:33.54

2024 Speedo Summer Championships · Meet 23–27 Jul 2024

200 Freestyle LCM

—Final21:58.47

200 Freestyle LCM

—Heat22:00.45

400 Freestyle LCM

—Final14:06.31

400 Freestyle LCM

—Heat34:12.34

800 Freestyle LCM

—Final18:26.43

1500 Freestyle LCM

—Final116:07.29

2024 U.S. Olympic Team Trials — Swimming · Lucas Oil Stadium, Indianapolis, IN · Meet 15–23 Jun 2024

400 Freestyle LCM

—Heat34:06.35

400 Freestyle LCM

—Final34:06.89

800 Freestyle LCM

—Final38:22.97

800 Freestyle LCM

—Heat28:31.58

2024 TYR Pro Swim Series - Knoxville · Westmont, United States of America · Meet 10–13 Jan 2024

200 Freestyle LCM

—Heat62:00.22

200 Freestyle LCM

—Final72:00.31

400 Freestyle LCM

—Final44:08.22

400 Freestyle LCM

—Heat34:09.84

800 Freestyle LCM

—Final38:28.00

2023 Toyota US Open — Swimming · Greensboro, NC · Meet 29 Nov–2 Dec 2023

200 Freestyle LCM

—Heat552:06.32

400 Freestyle LCM

—Heat154:16.32

400 Freestyle LCM

—Consolation Final154:16.58

800 Freestyle LCM

—Heat38:33.77

2023 World Aquatics Championships - Fukuoka · Meet 14–30 Jul 2023

800 Freestyle LCM

—Final68:19.73

800 Freestyle LCM

—Heat88:22.20

2023 Phillips 66 National Championships — Swimming · Indianapolis, IN · Meet 27 Jun–1 Jul 2023

200 Freestyle LCM

—Heat302:01.01

400 Freestyle LCM

—Consolation Final94:06.60

400 Freestyle LCM

—Heat94:09.81

800 Freestyle LCM

—Heat28:20.28

1500 Freestyle LCM

—Heat516:18.40

2023 TYR Pro Series - Mission Viejo · Knoxville, United States of America · Meet 17–20 May 2023

100 Freestyle LCM

—Heat4558.11

200 Freestyle LCM

—Consolation Final22:01.10

200 Freestyle LCM

—Heat132:02.62

400 Freestyle LCM

—Final24:10.22

400 Freestyle LCM

—Heat14:13.91

800 Freestyle LCM

—Final38:33.36

1500 Freestyle LCM

—Final116:31.00

50 Freestyle LCM

—Heat—NS

2023 TYR Pro Swim Series - Knoxville · Knoxville, United States of America · Meet 11–14 Jan 2023

100 Freestyle LCM

—Bonus Final—56.95

100 Freestyle LCM

—Heat2557.18

200 Freestyle LCM

—Consolation Final—1:59.78

200 Freestyle LCM

—Heat132:01.98

400 Freestyle LCM

—Final44:09.65

400 Freestyle LCM

—Heat34:11.52

800 Freestyle LCM

—Final48:34.26

1500 Freestyle LCM

—Final516:31.25

2022 16th FINA World Swimming Championships (25m) · Melbourne · Meet 13–18 Dec 2022

800 Freestyle SCM

—Final68:20.95

1500 Freestyle SCM

—Final816:09.72

2022 FINA Swimming World Cup · Indianapolis · Meet 3–5 Nov 2022

200 Freestyle SCM

—Heat31:58.98

400 Freestyle SCM

—Final74:05.50

400 Freestyle SCM

—Heat24:06.18

800 Freestyle SCM

—Final78:22.94

2022 Jr Pan Pacific Swimming Championships · Meet 24–27 Aug 2022

100 Freestyle LCM

—Heat2557.29

400 Freestyle LCM

—Final34:06.84

400 Freestyle LCM

—Heat24:10.83

800 Freestyle LCM

—Final18:30.38

1500 Freestyle LCM

—Final416:29.16

2022 TYR Pro Swim Series - San Antonio · San Antonio, United States of America · Meet 30 Mar–2 Apr 2022

100 Freestyle LCM

—Heat3459.35

200 Freestyle LCM

—Bonus Final172:02.38

200 Freestyle LCM

—Heat182:04.11

400 Freestyle LCM

—Final44:12.93

400 Freestyle LCM

—Heat54:16.79

800 Freestyle LCM

—Final48:43.74

1500 Freestyle LCM

—Final217:13.12

2021 Toyota US Open — Swimming · Greensboro, NC · Meet 30 Nov–4 Dec 2021

100 Freestyle LCM

—Heat3259.73

200 Freestyle LCM

—Consolation Final132:03.68

200 Freestyle LCM

—Heat192:06.68

400 Freestyle LCM

—Heat84:16.57

400 Freestyle LCM

—Final84:17.53

800 Freestyle LCM

—Heat88:46.42

2021 U.S. Olympic Team Trials — Wave II · CHI Health Center, Omaha, NE · Meet 13–20 Jun 2021

400 Freestyle LCM

—Heat454:22.45

800 Freestyle LCM

—Heat238:47.77

2020 Toyota US Open — Swimming · Greensboro, NC · Meet 12–14 Nov 2020

200 Freestyle LCM

—Final392:04.43

400 Freestyle LCM

—Final194:18.40

1500 Freestyle LCM

—Final1917:05.63

2019 20 TYR Pro Swim Series #1 Greensboro · Greensboro, United States of America · Meet 6–9 Nov 2019

200 Freestyle LCM

—Bonus Final62:03.80

200 Freestyle LCM

—Heat282:05.51

400 Freestyle LCM

—Consolation Final34:16.51

400 Freestyle LCM

—Heat164:20.32

800 Freestyle LCM

—Final118:53.56

2025 SEC Swimming and Diving Championships

200 Freestyle SCY

—Preliminary181:45.72

200 Freestyle SCY

—Bonus Final221:46.21

500 Freestyle SCY

—Championship Final14:31.54

500 Freestyle SCY

—Preliminary14:35.18

1650 Freestyle SCY

—Final115:30.33