Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_25582 ( "Rank" real, "Metropolitan area" text, "Principal city" text, "10,000+ places" real, "Densest incorporated place" text, "Density" text )

### Question ###
Name the least 10,000+ places for louisville

### Accurate SQL ###

SELECT MIN("10,000+ places") FROM table_25582 WHERE "Principal city" = 'Louisville'