Investing in mutual funds for retirement is never too late. And the Zacks Mutual Fund Rank can be an excellent tool for investors looking to invest in the best funds.

The easiest way to judge a mutual fund's quality over time is by analyzing its performance, diversification, and fees. Using the Zacks Mutual Fund Rank of over 19,000 mutual funds, we've identified three outstanding mutual funds that are ideally suited to help long-term investors pursue and achieve their retirement investing goals.

Here are the funds that have achieved the Zacks Mutual Fund Rank #1 (Strong Buy) and have low fees.

If you are looking to diversify your portfolio, consider Voya Growth & Income Portfolio A (IAVGX Quick QuoteIAVGX - Free Report) . IAVGX is part of the Large Cap Blend section, and these mutual funds most often invest in firms with a market capitalization of $10 billion or more. By investing in bigger companies, these funds offer more stability, and are often well-suited for investors with a "buy and hold" mindset. This fund is a winner, boasting an expense ratio of 1.12%, management fee of 0.6%, and a five-year annualized return track record of 11.44%.

MFS Mass Investors Growth Stock R2 (MIRGX Quick QuoteMIRGX - Free Report) . Expense ratio: 0.96%. Management fee: 0.33%. MIRGX is a part of the Large Cap Growth mutual fund category, which invest in many large U.S. companies that are expected to grow much faster compared to other large-cap stocks. This fund has managed to produce a robust 12.24% over the last five years.

Fidelity Select Technology (FSPTX Quick QuoteFSPTX - Free Report) . Expense ratio: 0.69%. Management fee: 0.53%. Five year annual return: 17.97%. FSPTX is a Sector - Tech mutual fund, allowing investors to own a stake in a notoriously volatile sector with a much more diversified approach.

There you have it. If your financial advisor had you put your money into any of our top-ranked funds, then they've got you covered. If not, you may need to talk.