The citizens of Colusa are slightly less educated than the national average of 21.84% for the average city or town: 14.26% of adults in Colusa have a bachelor's degree or advanced degree
The per capita income in Colusa in 2018 was $30,046, which is lower middle income relative to California, and middle income relative to the rest of the US. This equates to an annual income of $120,184 for a family of four. However, Colusa contains both very wealthy and poor people as well.
Colusa is an extremely ethnically-diverse city. The people who call Colusa home describe themselves as belonging to a variety of racial and ethnic groups. People of Hispanic or Latino origin are the most prevalent group in Colusa, accounting for 57.38% of the city’s residents (people of Hispanic or Latino origin can be of any race). The greatest number of Colusa residents report their race to be White, followed by Black or African-American. Important ancestries of people in Colusa include German, Irish, English, Italian, and Swedish.
Foreign born people are also an important part of Colusa's cultural character, accounting for 24.91% of the city’s population.
The most common language spoken in Colusa is English. Other important languages spoken here include Spanish and Polish.
