The zip code 03104 in Manchester, New Hampshire is classified as a "Low Diversity" area with a "White Majority" as of 2022. The white population comprises 80% of the total, exceeding the 75% threshold for low diversity. Over the past decade, the area has undergone modest demographic changes, showing a slight trend towards increased diversity. The zip code has experienced fluctuations in median income, with a notable increase in recent years.

From 2013 to 2022, the zip code has maintained its "White Majority" status. The white population has gradually decreased from 82% in 2013 to 80% in 2022, indicating a slow but steady diversification trend. This change suggests the area may be in the early stages of becoming a "Transitional Community." The Hispanic population has shown the most significant growth, increasing from 7% in 2013 to 8% in 2022. The Asian population has remained relatively stable at 3-5%, while the Black population has increased slightly from 2% to 4%. The "Two or More Races" category has grown from 1% to 5%, indicating an increase in multiracial residents.

The median income in the zip code has fluctuated over the past decade. From 2013 to 2022, there has been an overall increase from $70,258 to $76,405, representing an 8.7% growth. This growth has not been linear. The area experienced a peak in median income in 2021 at $84,259, followed by a significant drop in 2022. The periods of increased diversity appear to correlate with periods of economic growth. For instance, the years 2020 and 2021, which saw increases in diversity, also saw significant increases in median income.