According to the United States Census Bureau, the city has a total area of 9.1 square miles (23.6 km²), all of it land.
Brownsville is situated on the southeastern edge of the New Madrid Seismic Zone, an area with a high earthquake risk.
There were 4,105 households out of which 35.4% had children under the age of 18 living with them, 38.8% were married couples living together, 27.3% had a female householder with no husband present, and 30.2% were non-families. 27.0% of all households were made up of individuals and 11.8% had someone living alone who was 65 years of age or older. The average household size was 2.58 and the average family size was 3.11.
In the city the population was spread out with 29.5% under the age of 18, 10.4% from 18 to 24, 27.1% from 25 to 44, 19.4% from 45 to 64, and 13.6% who were 65 years of age or older. The median age was 33 years. For every 100 females there were 80.2 males. For every 100 females age 18 and over, there were 73.3 males.
The median income for a household in the city was $27,276, and the median income for a family was $33,782. Males had a median income of $30,313 versus $22,030 for females. The per capita income for the city was $15,217. About 18.0% of families and 21.3% of the population were below the poverty line, including 26.3% of those under age 18 and 27.0% of those age 65 or over.
Brownsville's National Historic Landmark synagogue, Temple Adas Israel, built in 1882, is believed to be the oldest synagogue building in Tennessee, and is a rare example of a synagogue built in Gothic Revival style.
Yank Rachell, blues artist and mandolin player, was born in Brownsville in the early 1900's. He recorded, toured Europe, Japan and shortly before his death in 1997 returned to Brownsville to perform Jug Band recordings with "Lovin' Spoonful" fame, John Sabastian and the J-Band.
Billy’s book, The Mindfield Years, is a further representation of his life told through the voices of three main characters and their efforts to find meaning, purpose, and contentment in the existence to which they were born. Written in stream of consciousness style, the novel contains elements of short story, poetry, philosophy, and psychology intermingled into a multi-layered yet deceptively simple tale. Billy is currently at work on volume two of this series, his “Goodbye.”
“There…is no one to relinquish tonight;
there is nothing to give up.
I…have seen the stars, and the moon, and now
I hear music. There are crickets creaking.
There are dark outlines of trees against the sky,
but the sky goes on; I have seen the heavens, and now
I can see forever; perhaps, it is all there;
perhaps, it is here. Tonight, I do not believe I will
leave anything, I will take it all, even then and tomorrow.
I shall live, and, the night, the day, is all;
I will become the Heavens; the Earth; I will not
give it up,
just quite---,
…not yet.”