Organization settings are only visible to organization owners, reached from the team switcher's org header (for owners) or directly at your organization's settings URL. General, Teams, and Members appear under an Organization section in the left-hand menu; select Back to Team above it to return to your team dashboard.
Renaming your organization
Update the Organization name field and select Save Changes — the button stays disabled until you've actually changed the name.
Organization facts
Below the name field: the organization's Slug (can't be changed after creation), Created date, and Created by. Below that, the owner, member, and team counts are links — select any of them to jump straight to the Members or Teams page.
Deleting your organization
At the bottom of the page, select Delete.... The confirmation dialog lists everything that will be permanently removed — every team, member, deal, contact, role, and all other data — and requires typing the organization's exact name before Delete Organization is enabled. This cannot be undone.
See Managing your organization's teams and Organization members for the other two organization-level settings pages.