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 learn about some of Zacks' highest ranked mutual funds with low fees you may want to consider.

Bridges Investment Fund (BRGIX Quick QuoteBRGIX - Free Report) has a 0.77% expense ratio and 0.5% management fee. BRGIX 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. With yearly returns of 11.77% over the last five years, this fund clearly wins.

JPMorgan US Equity Fund R6 (JUEMX Quick QuoteJUEMX - Free Report) : 0.44% expense ratio and 0.4% management fee. JUEMX is a Large Cap Blend fund, targeting companies with market caps of over $10 billion. These funds offer investors a stability, and are perfect for people with a "buy and hold" mindset. With yearly returns of 12.4% over the last five years, JUEMX is an effectively diversified fund with a long reputation of solidly positive performance.

Fidelity Select Semiconductors (FSELX Quick QuoteFSELX - Free Report) . Expense ratio: 0.69%. Management fee: 0.53%. Five year annual return: 24.73%. With a much more diversified approach, FSELX--part of the Sector - Tech mutual fund category--gives investors a way to own a stake in the notoriously risky tech sector.

We hope that your investment advisor (if you use one) has you invested in one or all of the top-ranked mutual funds we've reviewed. But if that isn't the case, it might be time to have a conversation or reconsider this vitally important relationship.