The center line, represented by the blue line in the diagram, runs across the middle of the field and divides it into two equal halves. Often referred to as the halfway line, it is placed at the exact center of the field. This line has several key functions: it marks where play is restarted with a kick-off after a goal is scored, it helps position the ball for the start of each half, and it serves as a boundary for players. For example, during a kick-off, all players must remain in their own half of the field and cannot cross the center line until the ball is in play.

The halfway line is parallel to the touchlines and matches their length, typically measuring between 50 and 100 yards.