| Roles | Competed in Olympic Games | 
|---|---|
| Sex | Female | 
| Full name | Beatrice "Nancy"•Lyons (-Welch) | 
| Used name | Nancy•Lyons | 
| Born | 12 April 1930 | 
| Affiliations | ?, New South Wales, (AUS) | 
| NOC |   Australia | 
| Medals | OG | 
| Gold | 0 | 
| Silver | 1 | 
| Bronze | 0 | 
| Total | 1 | 
Nancy Lyons had the following podium finishes at major championships: 2nd in the 1948 Olympics 200 metres Breaststroke; 1st in the 1950 British Empire Games 3×110 yards Medley Relay (with Judy-Joy Davies and Marjorie McQuade), 2nd in the 1950 British Empire Games 220 yards Breaststroke.
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1948 Summer Olympics | Swimming (Aquatics) |  AUS | 
Nancy Lyons | |||
| 200 metres Breaststroke, Women (Olympic) | 2 | Silver | ||||
| 1952 Summer Olympics | Swimming (Aquatics) |  AUS | 
Nancy Lyons | |||
| 200 metres Breaststroke, Women (Olympic) | 15 | 
Date of birth is uncertain. Commonwealth Games data also has a DOB of 12 October 1930, but multiple sources confirm the DOB listed above.