| Robert Wertz | |
| State Assembly: | New York |
| District: | 6th |
| Term Start: | 1983 |
| Term End: | 2002 |
| Predecessor: | John C. Cochrane |
| Successor: | Philip Ramos |
| State Assembly2: | New York |
| District2: | 4th |
| Term Start2: | 1971 |
| Term End2: | 1982 |
| Predecessor2: | Prescott B. Huntington |
| Successor2: | George J. Hochbrueckner |
| Birth Date: | August 18, 1932 |
| Birth Place: | Kew Gardens, Queens, New York, US |
| Death Place: | Port Jefferson, New York, US |
| Party: | Republican |
| Spouse: | Dorothy |
| Children: | three |
| Alma Mater: | Alfred University Albany Law School |
Robert C. Wertz (August 18, 1932 – May 5, 2009) served for 32 years as a Republican member of the New York State Assembly.
Wertz was born in Kew Gardens, Queens. He attended Sewanhaka High School in Floral Park, New York. He received a Bachelor of Arts degree from Alfred University and a Juris Doctor degree from Albany Law School. Wertz served in the United States Marine Corps Reserve for six years with the 2nd Battalion 25th Marines.
Wertz worked for State Farm Insurance, after which he was a Senior Attorney in Appellate Division of the New York State Supreme Court. From 1967 through 1970, he served as Town Attorney for the Town of Smithtown, New York.
He was a member of the New York State Assembly from 1971 to 2002, sitting in the 179th, 180th, 181st, 182nd, 183rd, 184th, 185th, 186th, 187th, 188th, 189th, 190th, 191st, 192nd, 193rd and 194th New York State Legislatures. He left office in 2002, after losing to John J. Flanagan in a primary election for the New York State Senate.
Wertz and his wife Dorothy had three children: Mary, Donna, and Robert Wertz II.