I'm setting up some power tools in my basement, Band Saw, Table Saw, etc. I would like to add outlets to power these tools and be on one circuit, I was wondering if a 20 amp circuit would be sufficient instead of a 15 amp?

You need to read the electrical requirements for the tool in question.

Given the number of suggested in your comments, I would only recommend a 20 Amp circuit.

In fact, I would suggest you install at least two (2) such circuits.

Bear in mind, that these circuits, if they are in an unfinished basement have to be GFCI protected.

The tools I will be using in my basement, Bandsaw, Table Saw and Miter Saw require normal household current which would be 15 amps. I was wondering if 20 amps would be too much for these tools?

No, you want 20 amps.

The tools I will be using in my basement, Bandsaw, Table Saw and Miter Saw require normal household current which would be 15 amps. I was wondering if 20 amps would be too much for these tools?There is no "normal" household current.

Circuit current is an available amount. A 20A circuit simply has 5 more amps available than a 15A circuit.
There are codes in place telling us what types of circuits are allowed on certain size circuits (15, 20, 30, 40, etc).

Standard 15/20 amp 120v receptacles are ONLY allowed on 15 or 20A circuits.

I suspect that Dee134 has tools with a standard 15 amp plug, which appears to be "normal".

Since each tool has a 15 amp plug, each will run on a 15 amp circuit, probably each alone at one time.

The instructions of each tool will tell you what electrical requirements are needed to oeprate properly.