The Equal Rights Party was the name for several different nineteenth century political parties in the United States.
The first party was the Locofocos, during the 1830s and 1840s.
The Anti-Rent party during the Anti-Rent War was also known by this name during the 1840s and 1850s.
Another party by this name ran Victoria Woodhull for President of the United States and Frederick Douglass for Vice President of the United States in the 1872 presidential election. It was also known as the People's Party, the Cosmo-Political Party and the National Radical Reformers.
A fourth was the party that ran Belva Ann Lockwood for President in the 1884 and 1888 presidential elections and Marietta Stow and Alfred H. Love (and replacing him, Charles Stuart Wells) for vice president respectively. This was also known as the National Equal Rights Party.