Pauline Deltour was born on 17 February 1983 in Landerneau, Brittany, France.

In 2001, she enrolled in the design department of ENSAAMA (École Nationale Supérieure des Arts Appliqués et des Métiers d'Art) before continuing her studies at ENSAD (École Nationale Supérieure des Arts Décoratifs) in Paris, where she graduated in industrial design in 2007.

In 2006, she joined the Munich studio of German designer Konstantin Grcic, contributing to projects for companies including Vitra, Thonet, MUJI and Serafino Zani.

In 2010, she established her own studio in Paris and launched her first collection, A Tempo, for the Italian company Alessi. The project stemmed from her graduation research exploring the expressive potential of wire.

The following year, she was shortlisted for the Design Parade at Villa Noailles with Process, a collection of office accessories made from extruded aluminium. She also developed another collection for MUJI and expanded the A Tempo range for Alessi with a laundry basket, stool and umbrella stand. Together with Anne-Laure Gautier, she designed the scenography for Babolat's temporary stringing stand at Roland-Garros.

In 2012, Deltour designed the Carousel coffee table for Kvadrat and introduced three collections for the Italian publisher Discipline: Roulé, a copper tray, and Tourné and Galbé, two series of glasses and wooden containers. That same year, she co-founded EBO (En Bande Organisée) with Anne-Laure Gautier and Gwenaëlle Girard.

In 2013, she designed Tea for Two, another coffee table for Discipline. She travelled to Japan to develop an assortment of traditional Japanese sweets for Japan Creative, produced by the confectionery house Shibafune Koide. During the exhibition Nouvelle Vague II, she presented her Aliasing collection at both the Salone del Mobile in Milan and Dubai Design Week. Alongside her studio practice, she also taught at the ECAL (École cantonale d'art de Lausanne).

In 2014, Deltour designed Argent de poche, a sterling silver collection for Puiforcat. She also created Honeycomb, a ready-to-wear collection for Sogo & Seibu.

In 2015, she began a collaboration with Lexon, launching the Fine collection, whose speaker received a Red Dot Design Award. She went on to design the Charlie desk accessories collection for the German brand Bowër, the Mirror external hard drive for LaCie, and Pierrot, a coat stand for Alessi. She also initiated her long-standing partnership with Trudon through the creation of the La Promeneuse diffuser.

In 2016, she launched Bonhomie, a collection of Japanese ceramics produced by the manufacturer 2016/ in the province of Arita. She also designed Superbag, two bags for the Swedish brand Hem, marking her first project with the company. As part of the Oui Design programme, she conceived and directed the making of Canes at the Corning Museum of Glass, a collective performance broadcast live. That same year, she became the first woman appointed Professor of Product Design at ECAL.

In 2017, Deltour presented Monimalz, a range of educational connected piggy banks, at the Consumer Electronics Show (CES) in Las Vegas for Yellow Innovation, the startup studio of the Groupe La Poste. She continued her collaboration with Trudon, designing perfume bottles and L'Éteignoir, and developed two highly modular collections for the German furniture manufacturer COR Sitzmöbel: the Floater sofa and desk system, and the Drop seating collection.

She returned to CES in 2018 with Yellow Innovation to present a prototype for a connected electric bicycle. The same year, she unveiled 356, a furniture collection shown at the Salone del Mobile as part of the Digest Fucina exhibition. She also began working with the French lighting manufacturer CVL Luminaires on the Signal collection and designed Bean for Turn Handles.

In 2019, she created Étreintes, a jewellery collection for the ethical jeweller JEM (Jewellery Ethically Minded). Following a trip to Colombia to meet women artisans, she designed four collections for Ames GmbH: the Caña stools, Cesta and Killa mirrors, and the Mecato bench. She also designed the medal for the 2019 Paris Marathon and launched Patio, a garden furniture collection of benches, chairs and armchairs for the historic French manufacturer Tolix. Hem released the Rope rugs, while Deltour created the Adão wall hooks for the Portuguese craft publisher Origin Made. Within EBO, and in collaboration with Gwenaëlle Girard, she designed the Paris showroom for the furniture and object publisher Moustache, which also produced Bagou, a cast-iron wall hook created by the two designers.

In 2020, she designed the Bloc coffee tables for the British publisher Established & Sons. She also created the Vvorker bag for Fabernovel and developed new variations of the Floater collection for COR Sitzmöbel.

In 2021, Hem introduced her Lolly side table, while Deltour expanded the Signal collection for CVL. Following her death on 5 September 2021, her husband established an advisory committee to ensure the continuation and development of the projects initiated by the Pauline Deltour Design Studio.

The following year, in 2022, the Swedish publisher Offecct launched the Pauline armchairs and sofas, as well as Thelma, a room divider designed by Deltour, and published the book Offecct + Pauline Deltour. Ames introduced the woven Choco and Suncho baskets and vases, COR released the Noto chair and lounge chair, and JEM expanded the Étreintes jewellery collection.

In 2023, the textile publisher Garro Éditions released Vibrant 01 Bleu, Vibrant 02 Terracotta, and Division Beige, based on Pauline Deltour's textile drawings and research.

The following year, Tolix expanded the Patio collection using the initial sketches and research she had undertaken in 2020.

In 2026, the Musée des Arts Décoratifs et du Design in Bordeaux devoted a retrospective exhibition to her work and published the accompanying monograph, Pauline Deltour: An Apparent Simplicity. That same year, the Deltour bag was released by TSATSAS.