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.

Let's take a look at some of our top-ranked mutual funds with the lowest fees.

Fidelity Advisor Series Equity Growth (FMFMX Quick QuoteFMFMX - Free Report) : 0.01% expense ratio and 0% management fee. FMFMX is a Large Cap Growth mutual fund, and these funds invest in many large U.S. firms that are projected to grow at a faster rate than their large-cap peers. With annual returns of 13.5% over the last five years, this fund is a winner.

JPMorgan US Equity Fund R2 (JUEZX Quick QuoteJUEZX - Free Report) : 1.19% expense ratio and 0.4% management fee. JUEZX 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. JUEZX, with annual returns of 10.22% over the last five years, is a well-diversified fund with a long track record of success.

Matthews Asia Small Companies (MSMLX Quick QuoteMSMLX - Free Report) is an attractive large-cap allocation. MSMLX is a Pacific Rim - Equity mutual fund; these funds typically invest in companies throughout the dominant export-focused markets of Hong Kong, Singapore, Taiwan, and Korea. MSMLX has an expense ratio of 1.32%, management fee of 1%, and annual returns of 12.18% over the past five years.

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.