Andrew White from the quantum technology laboratory at the University of Queensland, Australia, maintains an excellent web page listing conferences related to quantum technology around the world.   You can find his most recent listing for 2021 conferences here.

Harrisburg University maintains a web page called Quantumapalooza which provides a listing of free online learning opportunities for the Quantum Computing community.

In addition to the conferences shown on the list mentioned above, here are some additional conferences:

The National Quantum Science & Technology Symposium for the country of India will take place on July 26-August 3, 2021 (India Standard Time). It will be a virtual event organized by IIIT Hyderabad IEEE Future Directions Quantum Initiative, IEEE Hyderabad Section, and Quantum Ecosystems and Technology Council of India ( QETCI). There will be keynote speeches by Indian government officials, industry sessions by leading industry experts and also deep technical research-related talks by academia from all across India.

IBM will be holding a Quantum Educators Summit on August 3-4, 2021. This two-day digital conference is for undergraduate professors and high school teachers in any discipline who are eager to fit quantum computing into their classes. It will center around the math, science, and computer science central to quantum computing, while enrichment sessions will explore other focus areas.

A Quantum AI+Machine Learning virtual event organized by Transform Industry will occur on September 8, 2021. The event will bring together major industry, research institutions, government agencies, and investors whose primary goal is to drive forward the commercialization of and deployment of Quantum AI and ML technologies. The event will include a combination of in-depth case studies, live panels and Q+A and a comprehensive showcase of the entire eco system to help organizations understand the current status of the Quantum AI and ML landscape, explore potential applications, and benchmark against competitors

Quantum Australia 2021 organized by the Sydney Quantum Academy will occur on September 8-10, 2021 (Sydney Australia time). The conference will be both in-person and on-line and will bringing together world-leading quantum researchers, businesses, government decision-makers, startups, and big tech to share developments and ideas. The third day of the conference will include a Careers Fair that will allow students to connect and speak with employers about what they’re looking for, find out what’s in demand and have the opportunity to make an impression.

The Quantum Computing Summit London organized by Informa Tech will occur on September 22-23, 2021. The conference will be co-located with The AI Summit, has been designed to provide business, and technical insight, qualified via application-based quantum experiences to showcase how quantum is delivering real business value.

Quantum.Tech 2021 will be held as a virtual conference on September 30, 2021. The conference will cover the commercial applications of quantum computing, communications, and sensing.

The Quantum Partnerships Forum will be held in London, UK (or virtually, if a live event isn’t possible) on October 1, 2021. It will focus on creating and growing key partnerships within the quantum computing ecosystem and center around the themes of commercialization and supply chain. The forum will bring together researchers, hardware & systems builders, and equipment manufacturers to discuss design & engineering challenges, technical requirements, and case studies of successful industry partnerships. Similar to an ‘exchange’ format, forum attendees are expected to fill out profiles in order to increase the effectiveness of networking. The structure and content of the event emphasizes networking and the formation and dynamics of partnerships over product pitches, updates, and industry timelines.

D-Wave will be hosting its annual Qubits 2021 Conference as a virtual event on October 5-7, 2021. The conference will feature speakers presenting their latest work on quantum applications in manufacturing/logistics, financial services, biotech/pharma, materials science, healthcare, machine learning, and more. It will include educational sessions for developers who are new to quantum and as well as those folks with lots of experience. Speakers from D-Wave will discuss their quantum roadmap and the latest development tools.

The IEEE Quantum Week 2021 will return on October 18-22, 2021 as a virtual conference. The event is a multidisciplinary quantum computing and engineering venue that gives attendees the unique opportunity to discuss challenges and opportunities with quantum researchers, scientists, engineers, entrepreneurs, developers, students, practitioners, educators, programmers, and newcomers. IEEE Quantum Week aims to showcase quantum research, practice, applications, education, and training including programming systems, software engineering methods & tools, algorithms, benchmarks & performance metrics, hardware engineering, architectures, & topologies, software infrastructure, hybrid quantum-classical computing, architectures and algorithms, as well as many applications including simulation of chemical, physical and biological systems, optimization problems, techniques and solutions, and quantum machine learning.

The Inside Quantum Technology (IQT) Fall Conference will be held as a hybrid conference, both in-person and online, in New York City on November 1-5, 2021. The conference will be a gathering of business leaders, product developers, marketing strategists and investors anywhere in the world focused on quantum technology. Over 1,000 people will be attending this event (both in-person and online) from all over the world and from every area of quantum technology. It will include panels and keynotes on 15 vertical topics critical to those seeking new business revenues from quantum-related opportunities.

The Quantum Computing Summit Silicon Valley organized by Informa Tech will occur on November 3-4, 2021. It will run alongside the AI Summit has been designed to provide business, technical, research, academic and innovation insight, qualified via application-based quantum experiences to showcase how quantum is delivering real business value, drive process efficiency and cost optimisation.

The Second European Quantum Technology Conference (EQTC) has been postponed until November 29, 2021 to December 3, 2021 but will still be held in Dublin, Ireland.  This will be a follow-on to the first EQTC conference held in Grenoble, France in 2019. EQTC 2021 will provide full coverage of the most prominent and recent advances in European and International quantum technology activities across basic sciences, communication, computing, simulation and sensing/metrology. The conference program addresses a wide range of topics in quantum technologies including fundamental science, infrastructure development, industry engagements, education & training, encouraging and facilitating gender balance in the quantum community, international cooperation, and policy-making. It will provide a forum to highlight the state-of-the-art in quantum technologies both in Europe and from around the world.

The fifth annual Q2B Conference will take place as an in-person conference on December 7-9. 2021 in San Jose, California. The event emphasizes practical quantum computing and allows end users, hardware developers, software developers, and others to interact with world-class speakers to discuss the future of quantum computing.