In the US, there are both public (state-funded) and private universities.
Public universities are state-funded institutions and are usually large in size. Foreign students pay out-of-state tuition, which is often higher than that paid by in-state residents. However, tuition fees at public universities are generally less expense than private universities.
Private universities are supported by tuition fees, private donations and grants. They typically have a smaller student body and are more expensive to attend. However, private universities often have better facilities on offer and more funding set aside for international students or students with a household income less that £30-35,000. (Please see the page on university funding for more information).
Please note there are also US universities abroad (including in the UK) at which you can complete a Bachelor's degree following a US curriculum, as well distance education opportunties.