The RTPI said the consultation is "an open invitation to anyone interested – from planners and built environment professionals to national and local governments, politicians, business leaders and members of the public – to shape the future of the institute and the planning profession".
Responses will also influence the RTPI’s new corporate strategy that covers the ten-year period from 2020 onwards, the institute said.
Among the areas the body is seeking views on are two possible options for new "vision and mission" statements.
The first says the RTPI should "champion the power of planning to deliver quality places for people", and the second is "to advance the science and art of planning for the benefit of the public".
The consultation also asks for opinions on what areas the institute should focus on in the coming years.
These include: "explaining the value of membership and continually improving services to members"; "making the case for well-resourced planning, sought by both the public and private sectors"; "raising the profile of planning"; and "diversity and inclusivity: ensuring the planning profession is as representative of the communities it represents".
RTPI chief executive Victoria Hill said: "Planning has never been more crucial to society, or its future direction more debated.
"At a time of significant interest in the planning profession, with delivery pressures and immense opportunities and challenges facing the UK, the RTPI is keen to listen to our members and non-members alike on what matters most to them, to ensure our future work in advancing the influence and impact of planning can really benefit the public.
"I urge all those who care about the places we live and work to take part."
The deadline for responding to the consultation is midnight on Sunday 17 March 2019.
In November, the RTPI issued a public pledge, to be followed up by an 'action plan', to increase the diversity of its membership in line with the communities they serve.