The US/El Salvador Sister Cities (USESSC) network is a national, grassroots organization of U.S. citizens and residents who have formed ongoing partnerships with rural communities in El Salvador struggling for social justice. Twenty-five sister cities from across the United States are paired with Salvadoran communities in six of El Salvador's 14 provinces (including RIC with Las Anonas in San Vicente).

The overall network is a sister organization to the Association of Rural Communities for the Development of El Salvador (CRIPDES), a national peasant federation of 200 rural communities, including the sistered villages. USESSC provides political, moral and economic support to their Salvadoran counterparts, communicates regularly with them and raises awareness in the U.S. about El Salvador's continuing struggle for peace and justice.