| Olin Hatfield Chilson | |
| Office: | Senior Judge of the United States District Court for the District of Colorado |
| Term Start: | December 31, 1973 |
| Term End: | September 28, 1991 |
| Office1: | Judge of the United States District Court for the District of Colorado |
| Term Start1: | March 5, 1960 |
| Term End1: | December 31, 1973 |
| Appointer1: | Dwight D. Eisenhower |
| Predecessor1: | William Lee Knous |
| Successor1: | Richard Paul Matsch |
| Birth Name: | Olin Hatfield Chilson |
| Birth Date: | 22 November 1903 |
| Birth Place: | Pueblo, Colorado, U.S. |
| Education: | University of Colorado Law School (LL.B.) |
Olin Hatfield "Chilly" Chilson (November 22, 1903 – September 28, 1991) was a United States district judge of the United States District Court for the District of Colorado.
Born on November 22, 1903, in Pueblo, Colorado, Chilson received a Bachelor of Laws in 1927 from the University of Colorado Law School. At Colorado, he played college football as a quarterback and was captain of the 1925 Colorado Silver and Gold football team. He was also captain of the basketball and baseball teams at Colorado.[1]
Chilson entered private practice in La Jara, Colorado in 1927, practicing in Greeley, from 1927 to 1928, and in Loveland, from 1928 to 1954. He was a district attorney for the Eighth Judicial District of Colorado from 1940 to 1948. He was an Assistant Secretary of the United States Department of the Interior from 1956 to 1957. He was Undersecretary of the United States Department of the Interior from 1957 to 1958. He returned to private practice in Denver, Colorado from 1958 to 1960.
Chilson was nominated by President Dwight D. Eisenhower on February 19, 1960, to a seat on the United States District Court for the District of Colorado vacated by Judge William Lee Knous. He was confirmed by the United States Senate on March 1, 1960, and received his commission on March 5, 1960. He was a member of the Judicial Conference of the United States from 1970 to 1973. He assumed senior status on December 31, 1973. His service terminated on September 28, 1991, due to his death.