Kelley Duffy

United StatesUnited StatesActive
Events
Mile

Kelley Duffy is a United States middle-distance runner. She competes primarily in the 1500m, Mile and Mile.

Her personal bests include 4:43.34 in the 1500m, 5:34.78 in the Mile, 5:34.78 in the Mile, 4:15.37 in the 4x400m and 4:15.37 in the 4x400m. She is currently active on the international athletics circuit, representing United States.

Personal best · Mile5:34.78
2026 season best5:34.78Jan 23, 2026 · Lied Recreation Center, Ames, IA
2026 season best
Last competitionJim Duncan InvitationalApr 10, 2026 · 4:45.86
Jim Duncan Invitational

As of Nov 14, 2026: Mile 5:34.78, 2026 season best 5:34.78 (Jan 23, 2026, Lied Recreation Center, Ames, IA (USA)) · Last competition: Jim Duncan Invitational, Apr 10, 2026, 4:45.86

Personal bests

WA points calculator →
DisciplineResultAll-time2026
1500mSt. Louis 2026United States 1500 m all-time list4:43.34883 pts––
MileIndoorIA 20265:34.78725 pts––
MileIA 2026United States Mile all-time list5:34.78701 pts––
4x400mIndoorIA 20264:15.37–#574
4x400mIA 2026United States 4 × 400 m all-time list4:15.37––

Progression

SeasonDisciplineResultWindDateCompetitions
20264x400m 4:15.37–Jan 23, 2026Cyclone Open
20264x400m Indoor4:15.37–Jan 23, 2026Cyclone Open
20261500m 4:43.34–Mar 27, 2026WashU Distance Carnival
2026Mile 5:34.78–Jan 23, 2026Cyclone Open
2026Mile Indoor5:34.78–Jan 23, 2026Cyclone Open
FAQ

Frequently asked questions

Kelley Duffy's Mile personal best is 5:34.78, set on Jan 23, 2026 in Lied Recreation Center, Ames, IA (USA).

Kelley Duffy competes in the Mile.

2026 season best: 5:34.78, set on Jan 23, 2026 in Lied Recreation Center, Ames, IA (USA). Last competition: Jim Duncan Invitational on Apr 10, 2026, 4:45.86.