I also put Bressanone, Bolzano and Trento on the list - strictly speaking these are not ski resorts, but they're close to them and always good for a short trip.
The cities are alphabetically ordered.
Aosta
Perfumeries
Brands: Amouage, Annick Goutal, Antonio De Curtis, Comme des Garcons, Etat Libre d'Orange**, Eau d'Italie, Jovoy, Keiko Mecheri, LM Parfums, Mathias, Maria Candida Gentile, My Inner Island, Nasomatto, nu_be parfums, Neomist, Nez a Nez, Olivier Durbano, Officina Delle Essenze, Ortigia, Robert Piguet, The Hype Noses, The Art Of Shaving, The Laundress, The Merchant of Venice.
Brands: Andy Tauer, Farmacia SS Annunziata, Heeley, Mona di Orio***, Olfactive Studio, Testa Maura.
There also used to be Solange Azagury-Partridge.
Jolies Choses
Brands: Acqua dell'Elba, Lorenzo Villoresi, Montale.
Brands: Acqua di Parma
LA BOTANIQUE
Brands: L'Erbolario.
Bressanone
Perfumeries
Brands: Bond No 9, Heeley*, Keiko Mecheri, Montale**.
Brands: Escentric Molecules, Mirko Buffini.
Euvita
Brands: Carthusia.
Brands: Profumi del Forte.
Elite Di Lutteri
Brands: Acqua di Parma.
Bolzano
Brand Stores
Perfumeries
Brands: Acqua di Parma, Amouage, Aedes, Acqua dell'Elba*, By Kilian, Byredo, Carthusia, Cire Trudon, Clive Christian, Creed, Comme des Garcons*, Culti, d'Orsay, Diptyque, E.Coudray*, Etro, Frederic Malle, Juliette has a Gun*, Heeley, House of Sillage*, Indult, Keiko Mecheri, Knize, L'Artisan, LM Parfums**, Ligne St Barth, Lorenzo Villoresi, Le Galion*, Maison Francis Kurkdjian, Mancera, Memo, Mona di Orio, Miller Harris, Molton Brown*, Montale, Nasomatto, Profumum*, Parfums Micallef*, Panama 1924**, Profumi di Pantelleria**, Serge Lutens*, The Laundress.
There also used to be Comptoir Sud Pacifique, Crabtree&Evelyn, Maitre Parfumeur et Gantier, Ramon Monegal, Simone Andreoli.
Brands: at least Creed, d'Orsay. Paginegialle also lists CRABTREE & EVELYN, ETRO, FLORIS, FRAGONARD, LA BASE, LAURA TONATTO, TAYLOR of Old Bond Street.
Market Josef
Brands: Atkinsons**, COMME DES GARCONS, J.F.Schwarzlose, Laboratorio Olfattivo.
Profumeria Donatella
Brands: Acqua dell'Elba.
Profumeria Irene Ferrari
Brands: Acqua del Garda, Acca Kappa*, Brecourt, Caron, Dear Rose, Geoffrey Beene, Isabey, Reminiscence, The Merchant of Venice, Von Eusersdorff.
Brands: Maison Martin Margiela, Tom Ford Ford (blue series and Private Blend Oud Wood)
The branch at Via Portici 52 stocks Maison Martin Margiela, Van Cleef&Arpels Collection Extraordinaire.
Oberraucht Zitt AG-SPA
Brands: Simone Cosac.
PROFUMERIA BORAGINE
Brands: Molinard.
NATURALIS
Brands: L'Erbolario
Courmayeur
Perfumeries
Also at Facebook.Brands: Acqua di Parma, Amouage, Acqua di Biella, By Kilian, Creed, Costume National, Comme des Garcons, Caron, Christiano Fissore, d'Orsay, Eau d'Italie, Etro, Frederic Malle, Floris, Gianluca Bulega, Guerlain (incl. old stuff), Geoffrey Beene, Huitieme Art, Il Profumo, Juliette has a Gun**, Keiko Mecheri, Knize, Linari**, LesNez, Lorenzo Villoresi, Ligne St. Barth, Montale*, Mancera*, Miller et Bertaux, Mark Buxton*, Molinard, Nasomatto, Orto Parisi, Profumi di Pantelleria**, Paolo Gigli, Parfumerie Generale, Profumum, Profumi del Forte, The Laundress, Yosh.
Brands: L'Erbolario
CORTINA D'AMPEZZO
Perfumeries
Brands: at least Alexandre J, Amorvero, Brecourt, By Kilian, Cire Trudon, Casamorati, Escentric Molecules, Fueguia 1833, Fornasetti, Frederic Malle, Grossmith, Gabriella Chieffo, Houbigant**, Isabey, JTC Join the Club, Maison Francis Kurkdjian, Memo, Mona di Orio, Nobile 1942, Perris Monte Carlo**, Roja Dove Parfums**, Ramon Monegal, Von Eusersdorff, vero.profumo, Yosh, Xerjoff.
+ According to Extrait.it - Jeu des Garçons, Kiehl’s, Masque, Nabucco, Pantheon Roma, Peccato Originale, Place des Lices, Taylor of old Bond Street.
LYSBLANC
Brands: at least 777 Stephane Humbert Lucas, Amouage*, Aedes de Venustas, Acqua di Parma, Andy Tauer, Clive Christian**, Creed, Diptyque, DAVID JOURQUIN, Dr Vranjes, Etro, Eau d'Italie, Eight & Bob, Floris**, Heeley, Jovoy Paris, Keiko Mecheri, Laboratorio Olfattivo, Le Galion, Lorenzo Villoresi, Montale, Nomenclature, Officina delle Essenze, Olfactive Studio, Serge Lutens.
Brands: Santa Maria Novella.
Brands: Goti, Simone Cosac.
There also used to be Aqua Bland, Escentric Molecules, Kinski.
Profumeria Thilly
Brands: Serge Lutens, The Laundress.
Brands: Acca Kappa.
LA GENZIANA
Brands: L'Erbolario
Livigno
Perfumeries
Profumeria Gio
Also at Facebook.
Brands: Amouage, Andy Tauer, Boadicea The Victorious, Bond no. 9, Carthusia, Clive Christian, Diptyque Paris, Escentric Molecules, Etro, Frederic Malle, Heeley, Lorenzo Villoresi, Le Galion, Ormonde Jayne, Pantheon Roma, Parfumerie Generale, Profvmvm Roma, Reminiscence, The Beautiful Mind.
Some sources also list another adress (which is however in the same street) - VIA PLAN, 59 (profumeria Gio Vincenzo). This address is given for Carthusia, Heeley and Lorenzo Villoresi.
EMPORIO Cusini Drugstore
Brands: Byredo, Boadicea the Victorious, Bond No 9, Creed, Comme des Garcons*, Caron, Cire Trudon, Eight&Bob, Floris, Grossmith London**, Jean Patou, Jovoy, Juliette has a Gun, L'Artisan, Montale, Mancera, Memo, MariaLux, Nasomatto, Orto Parisi, Officina delle Essenze*, Profumi del Forte, Ramon Monegal, Re Profumo, Sooud, Tann Rokka, The Merchant of Venice*, Von Eusersdorff.
Brands: at least By Kilian, Cire Trudon, Creed, Grossmith London, Humiecki&Graef, Maison Francis Kurkdjian, Mona di Orio, Nasomatto, Tom Ford Private Blend.
Profumeria Helvetia
Brands: Acqua dell'Elba.
Brands: Acqua di Taormina.
Esse Emme
Brands: The Laundress.
Emmene Cusini / Botia Cantoni
Brands: Acqua di Portofino, Atkinsons, Acca Kappa, Erbario Toscano, Serge Lutens.
Brands: Erbario Toscano, Reminiscence.
Silene
Brands: Acqua di Parma, Serge Lutens.
Mara Shop
Brands: Acqua di Portofino.
Ton Bouquet
Brands: Acca Kappa, Erbario Toscano, Reminiscence, The Merchant of Venice.
Profumeria La Camana
Brands: Acqua di Parma.
LILLA
Brands: L'Erbolario
MADONNA DI CAMPIGLIO
Perfumeries
Also at Facebook.Brands: Acqua di Parma, Acca Kappa**, ACQUA DI GENOVA, Caron, Comptoir Sud Pacifique, DOMENICO CARACENI, Etro, Heeley, Histoires de Parfums, Honore des Pres, L'Artisan, La Maison de la Vanille, Lorenzo Villoresi, Mancera, Montale, Reminiscence, Olfactive Studio, Simone Andreoli, Serge Lutens, The Different Company.
LORENZI
Brands: Creed, Diptyque, Penhaligon's.
Merano
Perfumeries
Brands: Acqua di Parma, Amouage, Carthusia, Diptyque, Eau d'Italie, E.Coudray, Honore des Pres, Lorenzo Villoresi, Linari, L'Artisan, Miller et Bertoux, vero.profumo.
+According to Paginegialle: ANNICK GOUTAL, Bruno ACAMPORA, CARON, ETRO, IL PROFUMO, Jean Charles Brosseau, MEMENTO, PANPURI.
Also at Facebook.Brands: Alexandre J, Acqua dell'Elba, Brecourt, Clive Christian, Creed, Eight&Bob, Etat Libre d'Orange, Floris, Grossmith London*, Nasomatto, Rigaud, Ramon Monegal.
There also used to be Boadicea the Victorious, Cowshed.
PARFUMERIE MAYA
Brands: Acqua dell'Elba, Clive Christian, DAVID JOURQUIN, Laura Tonatto, Mona di Orio, Paglieri 1876.
Brands: Comme des Garcons.
MARKET JOSEF
Brands: Atkinsons**, Laboratorio Olfattivo.
Domus Meran
Brands: Acqua dell'Elba.
LA NATURA
Brands: L'Erbolario.
Ortisei
Perfumeries
Brands: at least Diptyque, d'Orsay, Frederic Malle, House of Sillage*, L'Artisan, Lorenzo Villoresi.
Additionally these brands are listed at the homepage of the store: Byredo, Creed, Culti, Etro, Indult, Keiko Mecheri, Knize, L'Artisan, LM Parfums**, Ligne St Barth, Memo, Nasomatto, Panama 1924**, Profumi di Pantelleria**.
There also used to be Comptoir Sud Pacifique, Crabtree&Evelyn, Maitre Parfumeur et Gantier, Ramon Monegal, Simone Andreoli.
The list is common to all stores.
Trento
Brand Stores
Perfumeries
Profumeria Estro
Brands: Acqua di Parma, Lorenzo Villoresi, My Inner Island, Serge Lutens, Simone Cosac, The Merchant of Venice.
l CAPUZZO
Brands: Creed, E.Coudray, Heeley, L'Artisan.
Stile
Brands: Histoires de Parfums.
Brands: Atkinsons, Acqua di Parma, Comme des Garcons, Maison Martin Margiela, Tom Ford Ford (blue series and Private Blend Oud Wood).
Profumeria Tempora Onlus
Brands: Erbario Toscano.
ERBORISTERIA L'ANGOLO DELLE ERBE
Brands: L'Erbolario
ERBOVITA
Brands: L'Erbolario
Closed Stores
*According to the homepage of the brand.
**According to the homepage of the store.
***According to distributor.
Thanks for the review. I was looking for Byredo in Livigno:) Great job!