| Alfred Egidio Modarelli | |
| Office: | Judge of the United States District Court for the District of New Jersey |
| Term Start: | January 3, 1951 |
| Term End: | September 22, 1957 |
| Appointer: | Harry S. Truman |
| Predecessor: | Seat established by 63 Stat. 493 |
| Successor: | Mendon Morrill |
| Birth Name: | Alfred Egidio Modarelli |
| Birth Date: | 27 November 1898 |
| Birth Place: | Union City, New Jersey |
| Education: | Columbia Law School (LL.M.) |
Alfred Egidio Modarelli (November 27, 1898 – September 22, 1957) was a United States district judge of the United States District Court for the District of New Jersey.
Born in Union City, New Jersey, Modarelli received an Artium Baccalaureus degree from Columbia University in 1920, an Artium Magister degree from the same institution in 1922, and a Master of Laws from Columbia Law School in 1922. He was in private practice in Union City from 1922 to 1948. He was a Judge of the Municipal Court of Union City from 1925 to 1934, an assistant prosecutor for Hudson County, New Jersey from 1934 to 1944, and a special assistant corporation counsel for Union City from 1944 to 1948. From 1948 to 1951, he served as United States Attorney for the District of New Jersey.
On November 29, 1950, Modarelli was nominated by President Harry S. Truman to a new seat on the United States District Court for the District of New Jersey created by 63 Stat. 493. He was confirmed by the United States Senate on January 2, 1951, and received his commission the following day, serving thereafter until his death on September 22, 1957.