Hello.
Do you know if its possible to locate detailed census data on a neighborhood or census tract level for the 2020 census? I want to find data like gender, age, and race for each neighborhood in a city. If there is more data like married vs not married people too that would be helpful
You can get small area demographic estimates from American Community Survey 2020 5-year estimates.
https://www.census.gov/programs-surveys/acs
However, these estimates are not based on Census 2020 numbers, the 2020 ACS estimates are based on Census Bureau's 2020 population estimates that were released before Census 2020 results were processed and published.
Data about married vs unmarried will not be available from Census 2020, they will only be available through ACS estimates.
You can query the data using CB's data finder tool - https://data.census.gov/cedsci/advanced
Be aware that it is not an easy to navigate tool:)