July 21, 2016

Via EDGAR

Mr. Gus Rodriguez

Accounting Branch Chief / Office of Financial Services

Securities and Exchange Commission

100 F Street, N.E.

Washington, D.C. 20549-4631

Re:	Bancolombia S.A.
	Form 20-F for Fiscal Year Ended December 31, 2015
	Filed April 22, 2016
	File No. 001-32535

Dear Mr. Rodriguez:

Set out below are the responses of Bancolombia S.A. (the “Bank”, “we”), to the comments of the Staff of the United States Securities and Exchange Commission (the “Staff”) set forth in its letter dated July 8, 2016, to Mr. Jaime Alberto Velásquez Botero, the Bank’s Chief Financial Officer (the “Comment Letter”).

The responses below are keyed to the headings indicated in the Staff’s comments and are designated with the letter “R” below the comment number. The comments themselves are set forth in boldface type. Unless otherwise indicated, all references are to the Bank’s annual report on Form 20-F for the fiscal year ended December 31, 2015 (the “Form 20-F”). References to “COP” refer to the lawful currency of Colombia.

Form 20-F for Fiscal Year Ended December 31, 2015

6. Financial Instruments

6.9 Written-Off Loan Portfolio, F-23

1. We note you have loans in the commercial, consumer and small business loan categories that are more than 360 days past due and that these types of loans are typically charged off when the length of delinquency is less than 360 days (180 days for consumer, 360 for commercial, and 180 for small business loans). Please tell us why these loans have not been charged off as of December 31, 2015 in accordance with your accounting policy.

Securities and Exchange Commission -2-

R. The Bank respectfully informs the Staff that some loans have not been charged off because Bancolombia has a written-off loan policy that applies at a client level. Under this policy, the loans of a debtor client are evaluated in the aggregate, by category. When 70% of the aggregate outstanding balance of the debtor client’s loans in a particular category are delinquent longer than the relevant time period referred to in Note 6.9, regardless of the length of the delinquency of individual obligations, the Bank charges off the entire balance of the debtor’s loans in that category. As a result, some individual loans might be charged off before the 180- or 360-day delinquency period has run with respect to those loans, while others might not be charged off until some time has elapsed after the relevant 180- or 360-day delinquency period. In addition, in some cases the Bank’s Collection Department may recommend that a loan not be charged off at the 180- or 360-day mark because there continues to be a high probability of recovery based on the value of collateral or other factors.

2. We note your written-off loan policy is 1,620 days for mortgage loans (and 720 days for Banistmo and Banco Agricola). Please tell us why this written-off loan period is significantly longer than the other loan types.

R. The Bank respectfully informs the Staff that the Bank’s written-off loan policy for mortgage loans in Colombia is significantly longer than the policy for other loan types because of the length of time required to repossess the collateral secured by the mortgage loan following a default. Once a mortgage loan is considered defaulted this process begins and generally takes 3.6 years to complete. Also, in most cases, there continues to be a high probability of recovery following default on a mortgage loan.

Note 30. First-time adoption of IFRS, page F-124

Potential Problem Loans, page 73

3. Please include a reconciliation of your statement of changes in equity and a statement of cash flows between Colombian banking GAAP and IFRS as required by paragraphs 24 and 25 of IFRS 1, in future filings.

Securities and Exchange Commission -3-

R. We respectfully inform the Staff that paragraph 23 of IFRS 1 requires entities to explain how the transition from pervious GAAP to IFRS affected, among other things, its reported financial position. We do not read paragraphs 23 through 25 of IFRS 1 as requiring a reconciliation of changes in shareholders’ equity under previous GAAP to changes in shareholders’ equity under IFRS.

Regarding cash flows, in response to the Staff’s comment, below we include a reconciliation table that provides the explanation of material first-time adoption adjustments from Colombian Banking GAAP to IFRS in the statement of cash flows for the year ended December 31, 2014. We do not believe that such a reconciliation should also be required in the Form 20-F that the Bank will fill for the year ending December 31, 2016 or subsequent filings.

Explanation of material adjustments to the statement of cash flows for 2014:

	For the year ended December 31, 2014
	Colombian banking GAAP			IFRS adjustments and reclassification			IFRS
	In millions of COP
Net income (loss)		1,878,721			551,064			2,429,785
Net cash provided by (used in) operating activities		(5,753,188	)		(914,228	)		(6,667,416	)
Net cash provided by investing activities		57,243			876,869			934,112
Net cash (used in) provided by financing activities		1,606,641			23,436			1,630,077
Effect of exchange rate changes on cash and cash equivalents		2,122,787			1,246			2,124,033
Increase (Decrease) in cash and cash equivalents		(4,089,304	)		(13,923	)		(4,103,227	)
Cash and cash equivalents at beginning of year		15,408,646			37,331			15,445,977
Cash and cash equivalents at end of year		13,442,129			24,654			13,466,783

Explanatory notes for adjustments and reclassifications of first-time adoption in the statement of cash flows:

Under Colombian Banking GAAP there are no special requirements or forms governing the presentation of the Bank’s statement of cash flows. The Bank elected to prepare its Colombian Banking GAAP statement of cash flows using the indirect method and by applying the presentation requirements but not the measurement and classification requirements of International Financial Reporting Standard No. 7, “Statement of Cash Flows”.

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The transition from Colombian Banking GAAP to IFRS required a reclassification of cash flows related to purchases of properties to be placed under financial leases. Under Colombian Banking GAAP these purchases were classified as investment activities, whereas under IFRS they are classified as operating activities. Apart from this, there are no other material differences between the statements of cash flows presented in accordance with Colombian Banking GAAP and those presented under IFRS.

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The Bank acknowledges that it is responsible for the adequacy and accuracy of the disclosure in its filings. In addition, the Bank acknowledges that the Staff’s comments or changes to the Bank’s disclosure in response to the Staff’s comments do not foreclose the Commission from taking any action with respect to the Bank’s filings and that the Bank may not assert the Staff’s comments as a defense in any proceeding initiated by the Commission or any person under the federal securities laws of the United States.

If you have any questions relating to this letter, please feel free to call Robert S. Risoleo of Sullivan & Cromwell LLP at (202) 956-7500. He may also be reached by facsimile at (202) 956-6974 and by e-mail at risoleor@sullcrom.com.

Very truly yours,

/s/ Jaime Alberto Velásquez Botero

Jaime Alberto Velásquez Botero

Chief Financial Officer

cc:	Joaquín Molina
	(PricewaterhouseCoopers Ltda.)
	Gabriel Jaime Lopez
	(Deloitte & Touche Ltda)
	Robert S. Risoleo
	(Sullivan & Cromwell LLP)