Social Explorer - An easy way to find U.S. census data by geographic area, create tables and export to Excel. Tips...
Open the database (using the above link) in another browser tab
Choose "Tables" in the top menu
Choose a survey and time period (example... US Decennial Census > Census 2000) and click "Begin Report"
Choose your geographies. Tip consider choosing both your specific location, and some broader locations for comparison. Example...
Choose Geographic Type > 040 State > Texas > "Add".
Repeat with 050 County > Texas > your county > "Add"
Repeat with 160 Place > Texas > your city > "Add"
Repeat with 800 Zip Code (or 860 for some surveys) > your zip code > "Add"
Repeat with 140 Census Tract > Texas > your county > your census tracts > "Add"
Click "Proceed to Tables"
Select data points of interest to you and click the "Add" button
Click "Show results"
From here you can export the data to Excel.
Other Local Data Sources
Austin Open Data Portal - Various maps, data sets and charts about Austin - content varies widely! Examples... Map of dangerous dog locations, charts/maps about afforadable housing, Austin Police Department data.