Many thanks to Sharon Smith, who sent this information on her Sinnamon family from Oswego County.  Many of her ancestors are buried in the Riverside Cemetery, and Sharon has shared some of the photographs taken at the Riverside Cemetery.  Also included is the 1900 and 1920 census from Onondaga Co., on members of her family.  Sharon's great-grandmother was from Oswego County.  This is my great grandmother's family on my father's side.

State New York, Town Village of Baldwinsville, Supv. Dist. No 12 Sheet NO. 2, County Onondaga,  Date June 5, 1900  Enum Dist. No 58  Line/Page No. 49 & 50:

Location Dwelling: No. 33;   Family No:  39
Name: Sinnamon, Albert R., head of family 
Color: white 
Sex: male
Month of birth:  June 
Year of birth: 1854 
Age:  45 
Married and No. of years married: 15
Place of birth:  New York
Place of  birth of father: England
Place of birth mother:  England
Occupation:  Machinist
Read:  yes; Write: yes; Speak English:  yes 
Home Owned: yes;   Farm or House:  house

Name: Sinnamon, Lizzie, Wife 
Color: White 
Sex:  Female 
Month of birth:  April 
Year of birth:  1858 
Age:  42 years old 
Married and No. of years married: 15 years 
Mother of how many children:  0 
No these children living:  0
Place of birth:  Canada
Place of birth father: England
Place of birth mother:  England
Year of immigration to U.S. : 1884
No of years in U.S.:   16
Can Read, Can Write

1920 Census, State, New York, County, Twp of Lysander, Sinnamon, Enumeration Date Jan 1920 Sheet 5 Dist 72

Charlotte Street, House number 24, number of dwelling 127, Number of family 125

Name: Sinnamon, Albert R,  Head,  Owned, free of Mtg.
Sex:   M 
Color:   white 
Age:  66
Marriage:  widow 
Place of birth:  New York, 
Father place of birth:  British Isle, mother tongue, English, 
Mother place of birth:  British Isle, Mother Tongue, English 
Able to speak English:  yes 
Occupation trade or profession:  Machinist, General nature of industy, Machine Shop Employer salary, wage
Education:  read yes, write yes

Name: Rowley, Annie, sister, sex, female, white, age 63, read yes, write, yes
*(parent info the same as Albert, only occupation different for Annie, Furrier, At home, wage

Riverside Cemetery:  Location of family plot.
It's across from Meadow Lake on Lakeside Ave & Main Ave. Section O /210 it's on the corner. One tall monument and then small ones. 
 

All buried at Riverside Cemetery, Oswego, NY:

Mary Sinnamon born May 9, 1799 died June 25, 1881

William Sinnamon 1825-1872

Rebecca Sinnamon 1833-1907

John Sinnamon 1827-1894

Eliza Sinnamon

Caroline V. Sinnamon 1866-1947

Elizabeth Sinnamon, wife of John Sinnamon, 
* (Stone is very hard to read, but appears to read:  died Nov. 8, 1866, 33 years 8 months 4 days, wife and mother) 
 

For more photographs of individual stones