The only US zip code in the US where all five numbers are the same, Newton Falls Ohio. The city had 4,557 residents as of 2020, according to the United States Census Bureau. The city takes its name from the two sets of waterfalls within the village, each on different branches of the Mahoning River. The city is known for its notable ZIP code (44444) and for its covered bridge, which is the second oldest in the state of Ohio. Motto: "Working toward a better tomorrow!"