The USA Bid Committee for the 2018 or 2022 Fifa World Cup will receive $100,000 from Cal South, the state soccer association for youth and adult soccer in Southern California.

The donation is the largest received by the USA Bid Committee to date and demonstrates the grassroots support that will be used to fund the bid efforts in the future.

“We want to thank Cal South for affirming their early support of the USA Bid,” said Sunil Gulati, chairman of the USA Bid Committee and president of US Soccer.

“Our bid is an investment, in every sense of the word, to pave the road for the next decade of the development of soccer in the United States. Cal South's support further exemplifies the leadership role that this organisation has taken in all areas of promoting and developing the sport in the United States.”

“We want to thank Cal South for their initiative to support the USA Bid with their donation," said David Downs, executive director of the USA Bid Committee. "Donations such as these will allow us the resources to successfully compete for the privilege of hosting the Fifa World Cup in 2018 or 2022 without having to tap into the funds that have been set aside to support the other aspects of the growth of soccer in the US.”

Cal South is an industry leader in soccer having produced more than 30 per cent of US men’s and women’s national team members. Cal South is also engaged in several urban outreach initiatives throughout Los Angeles and runs the annual Soccer Nation Expo, the largest free soccer family expo in the United States.

Gregg Falk, Cal South president, said: “We believe that this is an investment in the future of soccer in Southern California and the United States that can be best achieved by bringing the excitement, worldwide attention, and pride that comes with hosting the games.”

Fifa will announce the host countries for the 2018 and 2022 World Cups in December 2010.