New Jersey's 7th congressional district includes all of Hunterdon County and Warren Counties, and parts of Morris, Somerset, Union counties. The district is represented by Democrat Tom Malinowski, who was first elected in 2018, defeating Republican incumbent Leonard Lance. The district, which has become more ethnically diverse over time, is one of the most affluent congressional districts in the United States, with the fifth-highest median income in the nation. This was once a reliably Republican district, however, in recent years, it has narrowly voted Democratic.