"I Believe in You" is a song written by Roger Cook and Sam Hogin, and recorded by American country music artist Don Williams.

The song was Williams' eleventh number 1 on Billboard's country chart.

[1] "I Believe in You" was Don Williams' only Top 40 entry, where it peaked at number 24.

The song has sold 286,000 downloads in the United States in the digital era.

[3] It was best received in New Zealand, where it reached number four on the pop singles chart and is ranked as the 38th biggest hit of 1981.