Aging without children carries specific concerns — who advocates for you, who remembers your wishes — that general senior groups don't always address directly.
Where to look
Organizations and online communities specifically for the "childless not by choice" and "childfree" communities in later life have grown significantly, alongside broader "solo ager" or "elder orphan" support groups, some hosted by AARP and similar organizations.
A group of peers in the exact same situation often provides validation and practical tips that well-meaning friends with children can't fully offer.