As a cultural point of interest, I am posting this list in case you are staying at a hotel or live in an area where the markets take place.

The times are given in 24 hour time (e.g., 13h = 1 p.m.; 19h30 = 7:30 p.m.)

1st arrondissement

Marché Saint-Honoré
Place du Marché Saint Honoré
Wednesday from 15h à 20h, Saturday from 7h à 15h

3rd arrondissement

Marché Enfants rouges
39 rue de Bretagne.
From Tuesday to Saturday  8h30 à 13h and from 16 à 19h30 (until 20h Friday and Saturday)
Sunday from 8h30 to 14h.

4th arrondissement

Marché Baudoyer
Place Baudoyer
Wednesday from15h to 20h30, Saturday from 7h to 15h

5th arrondissement

Marché Maubert
(formerly known as Carmes)
Place Maubert.
Tuesday, Thursday 7h to 14h30 and Saturday 7h to 15h
Métro : Maubert-Mutualité

5th Marché Monge
Place Monge.
Wednesday, Friday, 7h to 14h30 and Sunday, 7h to 15h
Métro : Place Monge

5th Marché Port Royal
Le long de l’hôpital du Val de Grâce, bd de Port-Royal.
Tuesday, Thursday, 7h to 14h30 and Saturday 7h to 15h
Métro : Port-Royal.

6th arrondissement

Marché St-Germain - Covered
4/8 rue Lobineau.
Tuesday to Saturday 8h30-13h and 16h-19h30 ; Sunday. 8h30-13h.
Métro : Mabillon

6th Marché Raspail
Boulevard Raspail between the streets Cherche-Midi and Rennes.
Tuesday and Friday 7h à 14h30
Métro : Rennes

7th arrondissement

Marché Saxe-Breteuil
(formerly known as Breteuil)
On Avenue de Saxe.
Thursday, 7h à 14h30 and Saturday 7h à 15h
Métro : Ségur

8th arrondissement 

Marché covered Europe
1 rue Corvetto.
Tuesday to Saturday 8h-13h30 and 16h-19h ; Sunday. 8h-13h
Métro : Villiers

8th arrondissement

Marché Aguesseau
Place de la Madeleine.
Tuesday and Friday from 7h to 13h30

10th arrondissement

Marché Alibert
Rue Alibert in front of  the Hospital St-Louis.
Sunday, 7h to 15h
Métro : Goncourt

10th arrondissement

Marché Marché covered St-Quentin
85 bis, Blvd Magenta.
Tuesday to Saturday 8h30-13h and 16h-19h30 ; Sunday. 8h30-13h
Métro : Gare de l’Est

10th arrondissement

Marché St-Martin - Covered
31/33 rue du Château d’Eau.
Tuesday to Saturday 8h30-13h and 16h-19h30 ; Sunday. 8h30-13h
Métro : Château d’Eau

11th arrondissement

 Marché Belleville
Along boulevard de Belleville.
Tuesday, Friday 7h to 14h30
Métro : Belleville

11th arrondissement

 Marché Charonne
Between the streets Charonne and A. Dumas.
Wednesday, 7h to 14h30 and Saturday, 7h à 15h
Métro : Alexandre Dumas

11th arrondissement

 Marché Marché Bastille - near my house and probably the largest outdoor market in Paris
(formerly known as Richard-Lenoir)
Blvd Richard Lenoir between the streets Amelot and Saint-Sabin.
Thursday, 7h to 14h30 and Sunday, 7h à 15h
Métro : Bastille

11th arrondissement

Marché Père-Lachaise
Bd de Ménilmontant, entre les rues des Panoyaux et des Cendriers.
Tuesday, Friday 7h to 14h30
Métro : Ménilmontant

11th arrondissement

 Marché Popincourt
Bd Richard-Lenoir between the streets Oberkampf and Jean-Pierre Timbaud.
Tuesday, Friday 7h to 14h30
Métro : Oberkampf

12th arrondissement

Marché Beauvau - near my house and probably the most animated market in Paris

Place d'Aligre

From Tuesday to Saturday 8h30-13h and 16h-19h30 et Sunday 8h30-13h30
Métro : Ledru Rollin

12th arrondissement

Marché Cours de Vincennes
Between Blvd Picpus and Arnold Netter.
Wednesday, 7h to 14h30 and Saturday, 7h to 15h
Métro : Nation, Porte de Vincennes

12th arrondissement

Marché Bercy
Place Lachambaudie.
Sunday from 7h to 15h and Wednesday from 15h to 20h.

12th arrondissement

Marché Daumesnil
(formerly known as Bercy)

Bd de Reuilly between the street Charenton  place Félix Eboué.
Tuesday, Friday 7h to 14h30
Métro : Daumesnil, Dugommier

12th arrondissement

Marché Ledru-Rollin
Avenue Ledru-Rollin between the streets Lyon and Bercy.
Thursday, 7h to 14h30 et Saturday, 7h to 15h
Métro : Gare de Lyon, Quai de la Rapée

12th arrondissement

Marché Poniatowski

Bd Poniatowski entre l’avenue Daumesnil et la rue Picpus.
Thursday, 7h to 14h30 and Sunday, 7h to 15h
Métro : Porte Dorée

12th arrondissement

Marché Saint Eloi
36-38 rue de Reuilly.
Thursday, 7h to 14h30 and Sunday, 7h to 15h
Métro : Reuilly-Diderot

13th arrondissement

Marché Alésia
Rues de la Glacière et de la Santé.
Wednesday, 7h to 14h30 and Saturday , 7h to 15h
Métro : Glacière

13th arrondissement

Marché Auguste-Blanqui.
(formerly known as Gobelins)
Bd Blanqui entre pl. Italie et r. Barrault.
Tuesday, Friday, 7h to 14h30 and Sunday, 7h to 15h
Métro : Corvisart, Place d’Italie

13th arrondissement

Marché Bobillot
Between Place Rungis and rue de la Colonie.
Tuesday, Friday, 7h to 14h30
Métro : Tolbiac ; bus 62 (Bobillot-Tolbiac)

13th arrondissement

Marché Maison-Blanche
Av. d’Italie between Nos. 110 to 162.
Thursday, 7h to 14h30 and Sunday, 7h à 15h
Métro : Maison-Blanche

13th arrondissement

Marché Salpêtrière
Place Salpêtrière, Blvd de l’Hôpital.
Tuesday, Friday, 7h to 14h30
Métro : Saint-Marcel

13th arrondissement

Marché Vincent-Auriol
(Formerly known as La Gare) Blvd V. Auriol between No 64 et rue Jeanne. d’Arc.
Wednesday, 7h to 14h30 and Saturday, 7h à 15h
Métro : Chevaleret

13th arrondissement

Marché Jeanne d’Arc
(formerly known as Tolbiac)
On the two plazas at Place Jeanne d’Arc.
Thursday, 7h to 14h30 and Sunday, 7h to 15h
Métro : Nationale

14th arrondissement

Marché Brune
Between Impasse Vandal and Blvd Brune
Thursday, 7h to 14h30 and Sunday, 7h to 15h
Métro : Porte de Vanves

Note: Beginning Thursday October 30 2003, the Marché Brune will be located on a portion of Avenue Georges Lafenestre, between Blvd. Brune and Avenue Maurice d'Aucagne and along rue du Général Séré de Rivieres, due to tramway construction.

14th arrondissement

Marché Edgar-Quinet
In the open area of  Blvd E. Quinet
Wednesday, 7h to 14h30 and Saturday, 7h à 15h
Métro : Edgar-Quinet

14th arrondissement

Marché Villemain
Between Avenue Villemain and rue d’Alésia.
Wednesday, 7h to 14h30 and Sunday, 7h to 15h
Métro : Plaisance

14th arrondissement

Marché Mouton-Duvernet
Place Jacques Demy
Tuesday and Friday from 7h to 14h30
Métro: Mouton-Duvernet

15th arrondissement

Marché Cervantes
Between rue Bargue and rue de la Procession
Wednesday, 7h to 14h30 and Saturday, 7h to 15h
Métro : Volontaires

15th arrondissement

Marché Convention
Rue Convention entre les rues Al. Chartier et l’Abbé Groult.
Tuesday, Thursday 7h to 14h30 and Sunday, 7h à 15h
Métro : Convention

15th arrondissement

Marché Grenelle
Blvdd de Grenelle, between rue Lourmel and rue du Commerce
Wednesday, 7h to 14h30 and Sunday 7h to 15h
Métro : La Motte-Piquet Grenelle

15th arrondissement

Marché Lecourbe
Rue Lecourbe between rues Vasco de Gama and Leblanc.
Wednesday, 7h to 14h30 and Saturday, 7h to 15h
Métro : Balard, Lourmel

15th arrondissement

Marché Lefebvre
Blvd Lefebvre between rues Olivier de Serres de Dantzig.

Wednesday, 7h to 14h30 and Saturday, 7h à 15h
Métro : Porte de Versailles

Note: Beginning Wednesday September 17, 2003, Marché Lefebvre will be located between avenue de la Porte de Plaisance, avenue Albert Bartholomé et rue André Theuriet, due tramway construction.

15th arrondissement

Marché Saint-Charles
(formerly known as Javel)

Rue St-Charles between rues de Javel and le rond-point St-Charles.
Tuesday, Friday, 7h to 14h30
Métro : Javel-André Citroën

16th arrondissement

Marché Auteuil
Place Jean Lorrain
Wednesday, 7h to 14h30 and Saturday, 7h to 15h
Métro : Michel-Ange-Auteuil

16th arrondissement

Marché Gros-La-Fontaine
(formerly known as Av. Versailles)
Rue Gros, Rue La Fontaine.
Tuesday, Friday, 7h to 14h30
Métro : Ranelagh

16th arrondissement

Marché Point du Jour
Av. de Versailles de la rue Le Marois à la rue Gudin.
Tuesday, Thursday, 7h to 14h30 and Sunday, 7h à 15h
Metro : Porte de Saint-Cloud

16th arrondissement

Marché Porte Molitor
(formerly known as Exelmans)
Place de la Porte Molitor (centre sportif -- near the sports hall).
Tuesday, Friday, 7h to 14h30
Métro : Porte Molitor

16th arrondissement

Marché Président Wilson
Av. du President Wilson between rue Debrousse and Place d’Iéna.
Wednesday, 7h to 14h30 and Saturday, 7h to 15h
Métro : Alma-Marceau, Iéna

16th arrondissement

Marché Amiral Bruix
Bldd Bruix between rues Weber and Marbeau.
Wednesday, 7h to 14h30 and Saturday, 7h to 15h
Métro : Porte Maillot

16th arrondissement

Marché couvert de Passy
Place de Passy.
Tuesday to Saturday, 8h30-13h and 16h-19h30 ; Sunday. 8h30-13h

Métro : Muette

16th arrondissement

Marché Saint-Didier - Covered
Rues Mesnil and St Didier.
Tuesday to Saturday  8h30-13h et 16h-19h30 ; Sunday. 8h30-13h

17th arrondissement

Marché Berthier
Along Blvd de Reims,to Square A. Ulmann.
Wednesday, 7h to 14h30 and Saturday, 7h to 15h
Métro : Porte de Champerret

17th arrondissement

Marché des Ternes - Covered
8 bis rue Lebon.
Tuesday to Saturday  8h30-13h and 16h-19h30 ; Sunday. 8h30-13h
Métro : Ternes

17th arrondissement

Marché Navier
Rues Navier, Lantiez et des Epinettes.
Tuesday, Friday, 7h to 14h30
Métro : Guy Moquet

17th arrondissement

Marché Batignolles - Covered
96 bis rue Lemercier.
Tuesday to Saturday  8h30-13h and 16h-19h30 ; Sunday. 8h-13h
Métro : Brochant

18th arrondissement

Marché Ornano
(formerly known as Clignancourt)
Bd Ornano entre rues Mt-Cenis, Ordener.
Tuesday, Friday,  7h to 14h30 and Sunday, 7h to 15h
Métro : Simplon

18th arrondissement

Marché Barbès
(formerly known as Lariboisière)
Blvd Chapelle across from l’ hôpital Lariboisière.
Wednesday, 7h to 14h30 and Saturday, 7h to 15h
Métro : Barbès-Rochechouart

18th arrondissement

Marché Ney
Blvd Ney between rues Jean Varenne and Camille Flammarion.
Thursday, 7h to 14h30 and Sunday, 7h to 15h
Métro : Porte de St-Ouen, Porte de Clignancourt

18th arrondissement

Marché Ordener
Between rues Montcalm and Championnet.
Wednesday, 7h to 14h30 and Saturday, 7h to 15h
Métro : Guy Moquet

18th arrondissement

Marché La Chapelle - Covered
10 rue l’Olive.
Tuesday to Saturday, 8h30-13h and 16h-19h30 ; Sunday. 8h30-13h
Métro : Marx Dormoy

19ème arrondissement

Marché Villette
Blvd de la Villette between Nos. 27 and 41.
Wednesday, 7h to 14h30 and Saturday, 7h à 15h
Métro : Belleville

19ème arrondissement

Marché Jean-Jaurès
Av. Jaurès between  rues de l’Ourcq and des Ardennes.
Tuesday, Thursday, 7h to 14h30 and Sunday, 7h to 15h
Métro : Ourcq

19ème arrondissement

Marché Joinville
At the angle of  rues Joinville and Jomard
Thursday, 7h to 14h30 and Sunday, 7h à 15h
Métro : Crimée

19ème arrondissement

Marché Secrétan - Covered
33, Av. Secrétan.
Tuesday to Thursday, 8h30-19h30 Friday, Saturday  8h30-20h, Sunday 8h-14h
Métro : Bolivar

19ème arrondissement

Marché Porte d’Aubervilliers
Av. de la Porte d’Aubervilliers.
Wednesday, 7h to 14h30 and Saturday, 7h to 15h
Métro : Corentin Cariou

19ème arrondissement

Marché Place des Fêtes
In the open area of  Place des Fêtes.
Tuesday, Friday, 7h to 14h30 and Sunday, 7h à 15h
Métro : Place des Fêtes

19ème arrondissement

Marché Porte Brunet
Av. de la Porte Brunet.
Wednesday, 7h to 14h30 and Saturday, 7h to 15h
Métro : Danube

19ème arrondissement

Marché Crimée-Curial
Even numbered side of the street,  rue de Crimée (between n° 236 and 246)
Tuesday and Friday from 7h à 14h30
Métro: Crimée

19ème arrondissement

Marché Riquet - Covered
42 rue Riquet.
Tuesday to Saturday,  8h30-13h and 16h-19h30 ; Sunday, 8h30-13h
Métro : Riquet

20th arrondissement

Marché Belgrand
Rues Belgrand, de la Chine and Place E. Piaf.
Wednesday, 7h to 14h30 and Saturday 7h to 15h

Métro: Porte de Bagnolet

20th arrondissement

Marché Davout
Blvd Davout between av. de la Portte de Montreuil and rue Mendelsson.
Tuesday, Friday, 7h to 14h30
Métro : Porte de Montreuil

20th arrondissement

Marché Mortier
Blvd Mortier between av. de la Porte de Ménilmontant and rue Maurice Berteaux.
Thursday, 7h to 14h30 and Sunday, 7h to 15h
Métro : Saint-Fargeau, Pelleport

20th arrondissement

Marché Pyrénées
Rue des Pyrénées between rues de l’ Ermitage and de Ménilmontant.
Thursday,  7h to 14h30 and Sunday, 7h to 15h
Métro : Pyrénées

20th arrondissement

Marché Réunion
Place de la Réunion.
Thursday, 7h to 14h30 and Sunday, 7h to 15h
Métro : Alexandre Dumas

20th arrondissement

Marché Télégraphe
Rue du Télégraphe (cimetière Belleville - Belleville cemetery)
Wednesday, 7h to 14h30 and Saturday, 7h to 15h
Métro : Télégraphe