Organiser Javier Rodriguez said demonstrators wanted an immigration system that was humane and not racist.
The House of Representatives has passed a bill that would make it a felony for immigrants to be in the US illegally.
President George Bush has proposed a guest-worker plan, proposing to allow foreigners to remain in the US for a set period of time to carry out specific jobs, but his Republican Party is divided over the issue.
Securing borders was a top priority for the President, but he also invoked the country’s history as “a nation of immigrants” to argue for a balanced approach.
Source: BBC News