The National Survey of College Graduates (NSCG) is an important source of information on the education and career paths of the college graduate population in the United States. The NSCG currently uses the American Community Survey as a frame for sampling new respondents. There is interest, however, in whether other, alternative datasets may be superior sources for sample frame construction. In this paper, we examine the suitability of one of these datasets – the National Student Clearinghouse – by comparing its coverage and alignment with the ACS (the current frame source). Despite some deficiencies, the NSC has excellent coverage compared to the ACS, making it a candidate for potential supplementation, but not outright replacement of the current sampling frame.