Answer: There are many hotels located right on the banks of the Seine River, offering wonderful river views. Here are 5 recommendations for such hotels that are considered popular and frequently booked on Booking.com and other hotel websites:

Hotel Saint-Louis en L’Isle - A 3-star hotel located in the heart of Île Saint-Louis, very close to Notre-Dame Cathedral. The hotel has received excellent ratings on Booking.com (9 out of 10 based on about 1,200 verified reviews) and is considered particularly popular in Paris. You can find several cruise companies with departure points for Seine cruises near the hotel.

Hotel Eiffel Seine - A 3-star hotel in one of the best locations in Paris, right next to the Eiffel Tower and on the banks of the Seine. The hotel is relatively expensive but boasts a prime location. From there, you can take cruises departing near the Eiffel Tower, such as those of Bateaux Mouches or Bateaux Parisiens.

The One Alma Paris - A luxurious 5-star hotel in an excellent location on the Seine River, not far from the Eiffel Tower. The hotel has received excellent ratings online, especially among families with children.   

Hôtel d’Orsay - A highly rated hotel with excellent guest reviews, located near the Seine River and the famous Musée d’Orsay. The hotel offers double rooms and family rooms and is considered very popular among travelers in Paris.

Hôtel Victoria Châtelet - A 3-star hotel on the Seine River, located not far from the Louvre Museum and Notre-Dame Cathedral. Due to its excellent location, prices are a bit high, but according to many travelers, the value is well worth the cost.