Namesakes
Emmy Award Winners:
1 actress
(actress) Allison Janney 2002; 2004 The West Wing 
Fictional Characters from Song Titles:
1 character
(character) Allison 1990 Allison
Fictional Characters from Television:
5 characters
Ally McBeal 1997 Ally McBeal
Allison Doren 2001 Alias
Allison Taylor 2001 24
Allison Cameron 2004 House
Allison DuBois 2005 Medium
Hurricanes and Tropical Storms:
2 storms, 1 hurricane
Storm Allison 1989
Hurricane Allison 1995
Storm Allison 2001
Notable Actors and Entertainers:
3 actors, 1 actor/presenter
Alley Mills 1951-
Drew Carey (a.k.a. Allison) 1958-
Allison Janney 1959-
Allison Williams 1988-
Olympic Medalists:
1 bronze, 1 bronze/gold/silver, 1 bronze/silver, 1 silver
(bronze) Allison Higson 1988 swimming - 4x100 m medley relay
(silver) Allison Wagner 1996 swimming - 400 m medley
(bronze/silver) Allison Tranquilli 1996; 2004 basketball
(bronze/gold/silver) Allison Schmitt 2008; 2012 swimming
Oscar Award Winners:
1 actress
(actress) Allison Janney 2018 I, Tonya