It marks the 60-year-old's second spell in charge of the national time, having also led them between 2000 and 2002.
Van Gaal takes the reins from Bert van Marwijk, who stepped down last week following Oranje's disappointing Euro 2012 campaign.
"I am pleased the KNVB have approached me," Van Gaal said on the Dutch FA website. "This is the challenge I have waited for."
The USA will wear their blue away jersey against Jamaica in their World Cup qualifier on Friday night.
The adidas Nitrocharge is the most talked about new cleat in years. It was released on May 15 and will take your pitch by storm.
Barcelona will wear this new home soccer jersey next season. They also have a new away jersey. Get them both.
Neymar's move from Santos to Barcelona is no doubt the biggest summer transfer.
Jamaica is in need of a win against the U.S. Get the jersey of the Reggae Boyz.
England will debut their new away jersey against Brazil at the Maracana Stadium on Sunday. Get in the Gear
The Nike Hypervenom is the latest cleat silo from Nike. It will change your game and is worn by the game's top players.
Manchester City will try and win back the Premier League title with this new soccer jersey from Nike!
Germany is one of the top teams ever and they will play the US on Sunday.
The hoop soccer jersey is classic and cool. The USA hooped jersey is perfect for every fan. Get in the Gear.