It depends on the level of the game.
Youth games have 2 to 4 officials working those games. They try to schedule 3 or 4.
High school:
Freshamn have 3 officials working those game. (Referee, Umpire and Head Linesman)
J.V. has 4 officials working those games. (Referee, Umpire, Line judge and Head Linesman)
Varsity has 5 officials working those games. (Referee, Umpire, Line Judge, Head Linesman and Back Judge)
College and NFL games have 7 officials working those games (same as High school varsity, but also with Field Judge and Side Judge)
players, match officials, Referees, assistant referees, stewards
Four. One in the center, two assistant referees, and one fourth official.
There are 7 referees in a game.
Three, a center and two assistants. Possibly four if there is a fourth official on the sideline.
4 feferees. The main referee, two line referees, and the 4th referee who controls the board for substitutions.
3 referees are in soccer and football
seven
as a minium 1 referee and 2 assistant referees.
Football because in every professional match you need two referees of different cultures to the teams playing each other on that day.
there is usually 3 referees in highschool and college im not sure about the nba
8
The Football association relating to those matches will choose the referees from the set panel of referees that they have.