"Let You Down" is a song by American Christian hip hop artist and songwriter NF. It serves as the third single from his third studio album, Perception. It was released on September 14, 2017, for digital download and streaming. It is his first number-one single on the Hot Christian Songs chart. The song was originally uploaded as an audio video on September 14, 2017.

NF originally teased the track on Instagram in August, but removed it shortly there afterward. He later confirmed it would be a single on Twitter. It was produced by David Garcia and Tommee Profitt.

NF wrote the song about his relationship with his father and how he did not want to disappoint him. This is the first time he has publicly spoken about his relationship with his dad, who raised him as a child. His parents went through a divorce, and his mother overdosed years later. The track is similar to some of his songs like "Got You On My Mind" and "Wish You Wouldn't".

The song quickly rose to popularity, gaining over two million plays a day, making it to No. 12 on Spotify's Global Top 50.

"Let You Down" reached number one on the Hot Christian Songs chart. It has also reached number 75 on the Billboard Hot 100, NF's first entry on the chart. The song has achieved international success, charting in Australia, Canada, Sweden, and Ireland.

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