In 2023, Seneca, NE had a population of 28 people with a median age of 51 and a median household income of $36,250. Between 2022 and 2023 the population of Seneca, NE declined from 30 to 28, a −6.67% decrease and its median household income grew from $30,833 to $36,250, a 17.6% increase.
The 5 largest ethnic groups in Seneca, NE are White (Non-Hispanic) (92.9%), Two Races Excluding Other, & Three or More Races (Non-Hispanic) (7.14%), Black or African American (Non-Hispanic) (0%), American Indian & Alaska Native (Non-Hispanic) (0%), and Asian (Non-Hispanic) (0%).
None of the households in Seneca, NE reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.
100% of the residents in Seneca, NE are U.S. citizens.