The S&P/ASX 200 Index (ASX: XJO) contains plenty of shares I would be comfortable owning for years.
For a 10-year investment, I would look for companies with strong positions today and plenty of room to keep growing.
With that said, these three ASX 200 shares would be high on my list.
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Xero Ltd (ASX: XRO)
Xero is already a major player in cloud accounting, but I still think the business has a long way to run.
Its software helps small businesses manage areas such as invoicing, payroll, payments, reporting, and everyday financial administration.
Once a business has moved its accounts onto Xero and connected its accountant and other applications, the software can become deeply embedded in how it operates.
That can make its platform very sticky and help Xero retain customers while also giving it opportunities to offer them more services over time.
I particularly like the size of the market still available. Xero had around 4.9 million customers in FY26, compared with a global addressable market of roughly 100 million small businesses.
Payments, payroll, artificial intelligence (AI), and its expansion into areas such as accounts payable could all help Xero become a larger part of how those businesses manage their finances.
Over the next decade, I think both customer growth and deeper use of the platform could drive the company much higher.
ResMed Inc. (ASX: RMD)
ResMed would give me exposure to a completely different long-term opportunity.
The healthcare company develops devices, masks, and software for sleep apnoea and respiratory care.
ResMed has been growing for decades but is still only scratching the surface of its overall opportunity. More than one billion people globally are estimated to have sleep apnoea, while diagnosis and treatment rates remain relatively low. That leaves ResMed with a huge population still to reach.
Over a decade, I think the combination of an underserved healthcare need, recurring sales, and continued product development gives ResMed plenty of room to expand.
Goodman Group (ASX: GMG)
Goodman would be my third ASX 200 share pick.
The property group owns and develops industrial assets in major cities around the world, including warehouses, logistics facilities, and increasingly data centres.
I like the locations Goodman has accumulated. Large sites with access to power, transport links, and major population centres can become increasingly difficult to secure as cities grow.
That puts Goodman in a strong position as demand increases for logistics facilities and digital infrastructure.
Data centres could become particularly important as cloud computing and artificial intelligence require more computing capacity and electricity.
Projects of this scale take time and capital to develop, but Goodman already has the land, relationships, and development expertise needed to participate.
Foolish takeaway
10 years gives these businesses plenty of time to build on the positions they already have.
Xero can reach more small businesses, ResMed can treat more patients, and Goodman can continue developing scarce infrastructure in major global markets.
I think those opportunities make all three ASX 200 shares worth considering for a long-term portfolio.
