Sarsour of MPower Change and El-Messidi of CelebrateMercy organized the crowdfunding campaign to support the vandalized cemetery.
Their goal of reaching $20,000 by the end of March was surpassed in three hours, with donations at nearly $60,000 and rising early Wednesday.
CNN has reached out to Sarsour for comment but has not heard back.
American Muslim communities and organizations have also stepped up to support Jewish community centers that have targets of bomb threats. The Council on American Islamic Relations (CAIR), a Muslim civil rights and advocacy organization, is offering a $5,000 reward for information leading to the arrest of those who made the false bomb threats.