Ownership Submission
FORM 5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Form 3 Holdings Reported
Form 4 Transactions Reported
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

ANNUAL STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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1. Name and Address of Reporting Person *
FELTZ STEPHEN P
 2. Issuer Name and Ticker or Trading Symbol
NORTHWEST NATURAL GAS CO [NWN] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Treasurer & Controller
(Last)
(First)
(Middle)

220 NW SECOND AVE		 3. Statement for Issuer's Fiscal Year Ended (Month/Day/Year)
12/31/2010
(Street)


PORTLAND, OR 97209		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Reporting
(check applicable line)

_X_ Form Filed by One Reporting Person
___ Form Filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned at end of Issuer's Fiscal Year
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Amount (A) or (D) Price
Common Stock 01/05/2010   G 225 D $ 0 13,949 D  
Common Stock 01/05/2010   G 225 D $ 0 13,724 D  
Common Stock 06/18/2010   G 50 D $ 0 13,674 D  
Common Stock 12/27/2010   G 55 D $ 0 13,619 D  
Common Stock 12/27/2010   G 160 D $ 0 13,459 D  
Common Stock 12/27/2010   G 30 D $ 0 13,429 D  
Common Stock 12/31/2010   G 250 D $ 0 13,179 D  
Common Stock 12/31/2010   G 250 D $ 0 12,929 D  
Common Stock             3,345.2634 I See Footnote (1)
Common Stock 01/05/2010   G 225 A $ 0 294.635 I See Footnote (2)
Common Stock 12/31/2010   G 250 A $ 0 544.635 I See Footnote (2)
Common Stock 01/05/2010   G 225 A $ 0 228.635 I See Footnote (3)
Common Stock 12/31/2010   G 250 A $ 0 478.635 I See Footnote (3)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number. SEC 2270 (9-02)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned at End of Issuer's Fiscal Year
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
(A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Stock Option to Buy $ 31.34             (4) 03/04/2014 Common Stock
5,000
  5,000
D
 
Employee Stock Option to Buy $ 34.29             (5) 02/29/2016 Common Stock
2,500
  2,500
D
 
Employee Stock Option to Buy $ 44.48             (6) 02/28/2017 Common Stock
2,000
  2,000
D
 
Employee Stock Option to Buy $ 43.29             (7) 03/06/2018 Common Stock
2,000
  2,000
D
 
Employee Stock Option to Buy $ 41.15             (8) 03/04/2019 Common Stock
2,000
  2,000
D
 
Employee Stock Option to Buy $ 44.25             (9) 03/02/2020 Common Stock
2,000
  2,000
D
 

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
FELTZ STEPHEN P
220 NW SECOND AVE
PORTLAND, OR 97209		       Treasurer & Controller  

Signatures

Shawn M. Filippi, Attorney-in-Fact 02/14/2011
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Held in reporting person's account in issuer's Retirement K Savings Plan as of January 31, 2011.
(2) Held by reporting person as custodian under the Oregon Uniform Transfers to Minors Act for Grant M. Feltz.
(3) Held by reporting person as custodian under the Oregon Uniform Transfers to Minors Act for Callista Feltz.
(4) Option was granted for 5,000 shares pursuant to Northwest Natural Gas Company's Restated Stock Option Plan (the "Plan"). The option fully vested on January 1, 2007.
(5) Option was granted for 2,500 shares pursuant to Northwest Natural Gas Company's Restated Stock Option Plan (the "Plan"). The option fully vested on January 1, 2010.
(6) Option was granted for 2,000 shares pursuant to Northwest Natural Gas Company's Restated Stock Option Plan (the "Plan"). The option fully vested on January 1, 2011.
(7) Option was granted for 2,000 shares pursuant to Northwest Natural Gas Company's Restated Stock Option Plan (the "Plan"). The option vests in installments of 500 shares on each February 27, 2009 and January 1, 2010, 2011, and 2012.
(8) Option was granted for 2,000 shares pursuant to Northwest Natural Gas Company's Restated Stock Option Plan (the "Plan"). The option vests in installments of 500 shares on each February 25, 2010 and January 1, 2011, 2012, and 2013.
(9) Option was granted for 2,000 shares pursuant to Northwest Natural Gas Company's Restated Stock Option Plan (the "Plan"). The option vests in installments of 500 shares on each February 24, 2011 and January 1, 2012, 2013, and 2014.

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