1.  1810 Census Index and Digital Images (online at Ancestry.com; Image #4 of 5; extracted by Diana Gale Matthiesen):

1810

PA

Mifflin Co.

Derry Twp.

p. 1030

Anthony Woomer

31110-32010-00

11 60 0 0 2 9 3 5 0 0 50

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
3 males	9 or under	1800-1810	= Son E = Son D = Son C
1 male	10-15	1794-1800	= Son B
1 male	16-25	1784-1794	= Son A
1 male	26-44	1765-1784	= Anthony (b. 1774)
3 females	9 or under	1800-1810	= Daughter E = Daughter D = Daughter C
2 females	10-15	1794-1800	= Daughter B = Daughter A
1 female	26-44	1765-1784	= Wife
11	Woollen Cloth
60	Flaxen Cloth
0	Cotton Cloth
0	Hempen Cloth
2	Spinning Wheels
9	Common Sheep
3	Horses
5	Cattle
0	Looms
0	Hand Cards
50	Sugar

 Also in Derry Township:  Anthony's father, Godfrey WOMMER.

2.  1820 Census Index and Digital Images (online at Ancestry.com; Image #7 of 8; extracted by Diana Gale Matthiesen):

1820

PA

Union Co.

Buffaloe Twp.

p. 95

Womer Anthony

120101-10301-0-100

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	9 or under	1810-1820	=
2 males	10-15	1804-1810	=
1 male	19-25*	1794-1801	=
1 male	45 or over	in or bef. 1775	=
1 female	9 or under	1810-1820	=
3 females	16-25	1794-1804	=
1 female	45 or over	in or bef. 1775	=
1	person engaged in agriculture
*In the 1820 Census, the third column is age class 16-18 and the fourth column is age class 16-25; therefore, any individual in column three is duplicated in column four.  By subtracting the number in column three from the number in column four, you can create an age class "19-25."

Also in Buffalo Township:  Jacob WAUNER/WOMER(?).  List is alphabetical, so no neighborhood reconstruction is possible. 

3.  WorldConnect (online at RootsWeb.com).

4.  Raymond Martin Bell & James Allen Woomer.  1980. The Wommers of Saarland and Pennsylvania:  also Spelled Woomer, Womer, Wummer, Wumer.  Self-published, Washington, PA.  Not seen (as cited by J.T. Womer in the file at WorldConnect).