The more than 100 public advocacy groups will deliver a petition to Congress on Saturday calling for an end to the spying.
Thousands of people rallied against National Security Agency spying on Saturday in a march called "Stop Watching Us."
The rally on the US Capitol saw signs reading "Stop mass surveillance," "Thank you, Edward Snowden" and "No NSA mass spying."
The marchers included a diverse range of interests and ideologies, including right-leaning, libertarian, left-leaning groups.
The more than 100 public advocacy groups organizing the event, including the the Electronic Frontier Foundation and the Koch brothers' FreedomWorks, will deliver a petition to Congress on Saturday