| Sem Westerveld | |
| Birth Date: | 18 July 2002 |
| Birth Place: | San Sebastián, Spain |
| Height: | 1.93 m |
| Position: | Goalkeeper |
| Currentclub: | AZ |
| Clubnumber: | 13 |
| Youthyears3: | 2017–2021 |
| Years1: | 2021– |
| Caps1: | 34 |
| Goals1: | 0 |
| Years2: | 2022– |
| Caps2: | 0 |
| Goals2: | 0 |
| Club-Update: | 3 June 2023 |
Sem Westerveld (born 18 July 2002) is a Dutch professional footballer who plays as a goalkeeper for Dutch club AZ Alkmaar.
Westerveld made his professional debut with Jong AZ in a 1–0 Eerste Divisie loss to Roda on 4 January 2021.[1] On 18 June 2021, he signed his first professional contract with AZ Alkmaar for three years.[2]
Westerveld's father Sander Westerveld and grandfather Hennie Ardesch were also professional football goalkeepers.[3] Sem was born in San Sebastián, Spain while his father was playing for Real Sociedad.[4]