Form 485BXT VANGUARD SCOTTSDALE FUND

Explanatory Note

This Post-Effective Amendment No. 55 under the Securities Act of 1933, as amended (the “Securities Act”) (Amendment No. 56 under the Investment Company Act of 1940, as amended) to the registration statement on Form N-1A (the “Registration Statement”) of Vanguard Scottsdale Funds (the “Trust”) is being filed pursuant to paragraph (b)(1)(iii) of Rule 485 under the Securities Act solely for the purpose of delaying, until September 4, 2018, the effective date of the Trust’s 53rd Post-Effective Amendment. By way of further background:

• Post-Effective Amendment No. 53 was filed under Rule 485(a)(2) on May 21, 2018 for the purpose of offering a new series of the Trust, Vanguard Total World Bond ETF. Post- Effective Amendment No. 53 originally requested that the Amendment become effective on August 6, 2018, pursuant to the requirements of Rule 485(a)(2).
• The effectiveness of the Registration Statement was previously delayed pursuant to paragraph (b)(1)(iii) of Rule 485 of the Securities Act as follows:

This Post-Effective Amendment No. 55 incorporates by reference the information contained in Parts A, B, and C of Post-Effective Amendment No. 53 to the Trust’s Registration Statement.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended, and the Investment Company Act of 1940, as amended, the Registrant hereby certifies that it meets all requirements for effectiveness of this Registration Statement pursuant to Rule 485(b) under the Securities Act of 1933 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the Town of Valley Forge and the Commonwealth of Pennsylvania, on the 30th day of August, 2018.

Pursuant to the requirements of the Securities Act of 1933, as amended this Post-Effective Amendment to the Registration Statement has been signed below by the following persons in the capacities and on the date indicated:

*By: /s/ Anne E. Robinson

Anne E. Robinson, pursuant to a Power of Attorney filed on January 18, 2018, see File Number 33-32216, Incorporated by Reference.

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