If you’re looking for a masjid, the Stratford Mosque is small and welcoming. You can find them on Facebook. While their social media is out of date, they’re very warm and helpful if you message them and can answer any questions you might have.
A little further afield but a very direct drive there is also the Waterloo Masjid (40 mins) and the Kitchener Masjid (40 mins).
The nearest Sikh gurudwara is the Golden Triangle Sikh Association 30 minutes east of Stratford in Petersburg.
50 minutes southwest is the London Sikh Society.
The nearest Jewish synagogues are in Kitchener-Waterloo (30-40 mins from Stratford) and London (1 hr from Stratford).
In K-W:
Beth Jacob Congregation (modern Orthodox)
Temple Shalom (Reform)
The Rohr Chabad Centre For Jewish Life
In London:
Temple Israel (Reform)
Congregation Or Shalom (Conservative)
Congregation Beth Tefilah (Orthodox)
The Brahmrishi Mission of Canada Shri Ram Dham Hindu Temple is 45 minutes east of Stratford, also in Kitchener-Waterloo.
There are many different Christian church denominations in Stratford. You can find a pretty comprehensive list here.
Two of these churches are part of gaychurch.org‘s Affirming Church Directory:
Stratford has a vibrant community of Neo-Pagans, Wiccans, and those who identify as spiritual but not religious.
To connect with others, Emerald Muse is a great place to start, including workshops and classes, and The Space Within offers a holistic collection of healing services and personal development opportunities.
The Avalokiteshvara Kadampa Buddhist Centre hosts the Meditation and Modern Buddhism in Stratford meditation centre (Facebook: @MeditateInStratford)
In Kitchener-Waterloo you can find:
Fo Guang Shan Buddha’s Light Centre Waterloo
Vien Quang Vietnamese Buddhist Temple KW (find them on Facebook)
Waterloo Riverview Dharma Centre
Waterloo Wellington Buddhist Monastery and Meditation Centre