The following elections occurred in the year 1870.
- United States House of Representatives elections in California, 1870
- 1870 New York special judicial election
- 1870 New York state election
- United States House of Representatives elections in South Carolina, 1870
- 1870 South Carolina gubernatorial election
- 1870 and 1871 United States House of Representatives elections
- 1870 and 1871 United States Senate elections
The following elections occurred in the year 1870.
- United States House of Representatives elections in California, 1870
- 1870 New York special judicial election
- 1870 New York state election
- United States House of Representatives elections in South Carolina, 1870
- 1870 South Carolina gubernatorial election
- 1870 and 1871 United States House of Representatives elections
- 1870 and 1871 United States Senate elections