Sample Text
1234 Main St Smallville, KS 92348Small County
Should yield:
1234 Main St Smallville, KS 92348
Sa
You can use greedy .* before \d+ to make sure to match upto last digits:
.*
\d+
>>> print re.findall(r'^(.*\d+).*$', address)[0] 1234 Main St Smallville, KS 92348
Regex Demo