Hotel with pool in Paris

Molitor Paris Sofitel near Roland Garros has an outdoor pool, if that is what you are looking for.

Budget? Location? For children or a more adult feel? These are all indoor. I know of no outdoor pools in hotels in central Paris and I have looked because my son is in love with swimming during the summer. For children try, the Novotel Gare de Lyon -- on the RER line to Disney and very popular with families who want to stay in Paris but go to Disney. For "a be quiet I am the spa" pool, try the Lyric Hotel on Rue de Gramont -- was fine for my children but is not a "jump in and splash around" scene. The sky is the limit budget wise? -- try Le Bristol and it is designed to look like you are on a yacht in the Riviera. I have not been but I have heard good things about Hotel La Lanterne in the 5th. I've been to Hotel & Spa La Belle Juliet in the 6th and it is lovely but I never looked at their pool.

This is a popular hotel with a pool, not far from the Eiffel Tower and with reasonable room rates:
http://www.novotel.com/fr/hotel-3546-novotel-paris-centre-tour-eiffel/index.shtml

Thank you for these options! I didn't want to limit myself with options (such as budget and indoor/outdoor), as it looked like there were very few hotels with pools on Expedia. Any pool (in the city) would be great.

A much better option would be to find a nice hotel and look for a municipal swimming pool nearby - there are 38 of them in Paris.
It's a great way for kids and adults to unwind, costs about 3 EU for each entry (or you can buy a discounted pass, if staying in Paris long enough).

Requirements are mandatory: swim bonnets, no long baggy shorts for men or boys, bring 1 EU for each storage cabinet (refundable) and bring your own towels and toiletries.
Here's a list of all the municipal pools in Paris. Google Translate works OK, pay attention to the hours when "aquagym" classes are in session, some lanes might be restricted.
http://www.sortiraparis.com/loisirs/sport/guides/9557-le-guide-des-piscines-a-paris

Maybe liontrask means a jacuzzi...
But not many of those, either.